ORYKTOLOGIKA NEA-NEWS ON MINERALS January-February 2006

-NEWS ON MINERALS - 1 - Vol. 21 (2006) No 121

ORYKTOLOGIKA NEA - NEWS ON MINERALSISSN 1011-5870

21 , 121 - 2006

Vol. 21 , No 121 JANUARY - FEBRUARY 2006

,

HELLAS , A PARADISE FOR GEOSCIENTISTS ANDMINERAL COLLECTORS


Supporting the Collectors , the Mineral ,the Fossils and the Gem Industry for 21years : 2006 ,we enter to 21rst year of circulation of ORYKTOLOGIKA NEA-NEWSON MINERALS in 22 Countries.

It is very important to send you this issue as it is the first issue of the Vol. 21 ,one vol. every year ,21 volumes ,21 years. How fast time flies ! When I first thought to put in circulation a bilingualMineralogical Newsletter back in January 1986 , I could never imagine that things would flow onwish. It was a risk , but life without risk has no sense. We all , or almost all , know this. After thefirst year , ORYKTOLOGIKA NEA-NEWS ON MINERALS organized and sponsored the 1rstInternational Mineral, Gem and Fossil Show for Collectors in Hellas and also started to be the linkbetween Hellenic speaking and English speaking collectors worldwide. Also ORYKTOLOGIKA NEA-NEWS ON MINERALS founded the International Association of Collectors of Slag Minerals (IACSM)and continued to spread news and information in a short and sweet way in black and white untilthe year 2000 when turned into color. You will not believe it but within 20 years of circulation ofORYKTOLOGIKA NEA-NEWS ON MINERALS and 20 GeMin Exhibitions in Athens ,Greece , therewas a “Mineral, Gem and Fossil Fever” in Greece and now GeMin show apart being the mostcomfortable show in Europe , it is a show with substantial sales potential not only for DomesticCompanies but also for International Companies. Our cooperation with other publications , withother International show Organizers has resulted in a further promotion of Mineral, Gem andFossil activities. ORYKTOLOGIKA NEA-NEWS ON MINERALS is the link of Mineral ,Gem and FossilCollectors of Southeastern Europe with their colleagues in other areas and GeMin Exhibition is theMineral, Gem and Fossil Gate to the Market of Southeastern Europe for all these Mineral, Gem andFossil Companies which wish to promote their products , increase sales and expand businessactivities in the market of Southeastern Europe.. This year we celebrate in Athens 20 years ofGeMin shows. It was a long way to Ithaca ,we took and we gave and still we have not reached inIthaca, but this is the name of the game in life : You give and you take ! Be with us and we willnavigate toward Ithaca in the future. We have and we can give you more and leave to the nextgenerations of people , a way to reach people in this area through our fantastic hobby ,ourinvolvement with Minerals ,Gems, Fossils, Crystals and all those treasures of the Earth. Wepromise that we will be consistent for the next years as we were so far ,but we need you all , wethank you all and we will be glad to see you all on 25-26 November 2006 in Athens.

The Editor , ,

21 : 2006 , 21-NEWS ON MINERALS 22 .

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1986 , . ,

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, 20 . 20 GeMin 2006 , 25-26 2006.


Teofilo Otoni , Minas Gerais , Brazil : Some gemstones and informationBy

Dimitris G. Minatidis , M.Sc. ,AGCCGeologist-geochemist

70 Queen Sofia Avenue , Piraeus ,EL-185 32 , [email protected]

Téofilo Otoni is a city in northeast Minas Gerais state, Brazil. The population of the municipality was253,679 in 2005 and the area is 3,253.4 km².It lies at an elevation of 319 meters on the Todos os Santos River, a tributary of the Mucuri. Situatedon the Rio-Bahia Interstate Highway BR 116, it is 130 km. north of the regional center, GovernadorValadares, on the Doce River, and 664 km north of the state capital, Belo Horizonte. It was given citystatus in 1878.Teófilo Otoni is a trade centre for an agricultural hinterland in which livestock raising is of someimportance. The city has small-scale manufacturing and food-processing plants. Poor soils foragriculture and lack of industry have made Teófilo Otoni a major source of immigration to otherregions of Brazil and to the United States.Nationally and internationally it rivals Governador Valadares as the gem capital of Brazil. Extensivemining and gem trading for aquamarines, topaz, brazilianite, and various forms of quartz take placethere. A Gem and Mineral Show (Feira Internacional de Pedras Preciosas (FIPP), is held here everyyear, attracting international buyers. The fair provides the opportunity to buy both rough and cutstones directly from local producers, miners and cutters. Retrieved from "http://en.wikipedia.org’

(Courtesy : http://www.citybrazil.com.br/mg/regioes/teofilootoni/Am ,Amethyst , Tm ,Tourmaline , Aq ,Aquamarine , Em, Emerald , Tp ,Topaz

mailto:[email protected]

http://en.wikipedia.org

http://www.citybrazil.com.br/mg/regioes/teofilootoni/


Cut aquamarines. All of them then have a few inclusions. The total of carats are 362.00.5 stones - 1 oval, 1 round, 1 pear, and 2 rectangular.

L RL Emeralds from Brazil : 74 stones, 97.78 carats, and the price for the lot is U$ 800.00 per carat

R Emeralds from Brazil : 116 stones, 69.70 carats, and the price for the lot is U$ 650.00 per carat


L1 L2L1 Emeralds ,Brazil : 105 carats, and the price for the lot is U$ 400.00 per caratL2 Emeralds ,Brazil : 30.27 carats, and the price for the lot is U$ 450.00 per carat

T1

T2 T3

Gem Mining Operations in Brazil (Photograph Courtesy Samuel Soares)

T1 White Topaz crystals 15 to49 grams eahT2 White Topaz crystals 0.9to 14.9 grams eachT3 White Topaz crystals over50 gram each


Gem Mining Operations in Brazil (Photograph Couretsy Samuel Soares)

Bibliography : MINING REPORT ON BRAZIL by Kalil K. Elawar , edited by J. Wolf KuehnCanadian Institute of Gemmology,K. Elawar Ltda. Rua Epaminondas Otoni, 689 - cj.401/2 - Teófilo Otoni - MG - Brazil - PostalCode: 39800-000 , Phone: 55-33-522.4251 Fax: 55-33-521.5028Acknowledgements : We thank Mr. Samuel Soares , CEO of Soares OrganizationRua Dr. Reinaldo, # 43 - Centro Teofilo Otoni Brazil [BR] Tel:553335224570 / Fax :553335224570 /E-mail: [email protected] for providing photographs of hisgemstones and mines as well as Mr. J. Wolf Kuehn of Canadian Institute ofGemmology, http://www.cigem.ca, - Pacific School of Jewellery Arts P.O. Box 57010,Vancouver, B.C. V5K 5G6 Tel. (604) 530-8569, e-mail , [email protected] ,for theirpermission to cite maps with regions with gemstone production in Minas Gerais ,Brazil.

Use the friendly phrase : We found you inORYKTOLOGIKA NEA-NEWS ON MINERALS

Discovery of new planet similar to Earth25 2006

. , :

, 25.000 . Nature .

:http://www.esa.int/esaSC/SEMDJ3NZCIE_index_0.html25 January 2006It is not NEWS ON MINERALS sensus stricto but it has a worldwide interest :An international team of astronomers has discovered a planet more similar to Earth than anyfound to date. This groundbreaking discovery of a new extra solar planet , or exoplanet has beenmade by scientists searching for Earth-like planets capable of supporting life.The first details of this discovery are made in today’s edition of Nature.The new planet OGLE-2005-BLG-390Lb, which is only about 5-times as massive as the Earth, isthe smallest exoplanet ever found orbiting a star. Designated OGLE-2005-BLG-390Lb, theexoplanet is around 25.000 light years away from the Earth, close to the centre of our own galaxythe Milky Way. It has an orbital period of 10 years and is about three times as far from its parentstar as the Earth is from our Sun.


http://www.cigem.ca


http://www.esa.int/esaSC/SEMDJ3NZCIE_index_0.html


- From Australia : – Opal BookA lovely book on Opal, South Australia s Gemstone is available for 22 Australian dollars ,pluspostage and handling costs (around 10 AUS $ per book for Sea Mail or AUS $ 16 per book forEconomy Air Mail). This is a publication of the South Australian Department of Mines and Energy.Size of the book 15 cms X 21 cms , 177 pages full of color photos and maps. (Edition 1992)This is a book written by people who live and work in the heart of the largest Opal Fields in theworld , “speaks” to you and tells you all about Opal : What is Opal ? Geo logy of Opal ,miningmethods in the Opal Fields of Andamooka , Coober Pedy Mintabie ,The Opal Industry , Opalmining and the Law, Glossary of Opal , mining terms , selected bibliography and much more. This issome of the information inside this book on one of the most beautiful gemstones : O p a lHow to order in Europe: ORYKTOLOGIKA NEA-NEWS ON MINERALS have been assigned asOfficial Distributor in Europe for the book: Opal, South Australia s Gemstone. European orders willbe forwarded to : Dimitris G. Minatidis , c/o ORYKTOLOGIKA NEA-NEWS ON MINERALS ,70 Queen Sofia Avenue , Piraeus EL-185 32 , Hellas. Tel. Intern. : +30-210-4171-680 FAX : +30-210-4132-570 , E-mail: [email protected] . Payment will be sent-on receipt of Pro-Forma Invoice directlyto : Department of Mines and Energy ( Attention : The Editor , P. O. Box 151 , Eastwood , SouthAustralia 5063 , Australia . Tel (08)-274-7500 , FAX : (08)-2727-597. [email protected]

-NEWS ON MINERALS

: , . 22 + 10 16

. : - NEWS ON

MINERALS , . 70 , 185 32 , (210)-4171-680 , FAX: (210)-4132-570 e-mail : [email protected] . – - :

Department of Mines and Energy , P. O. Box 151 , Eastwood , South Australia 5063 , Australia(Attention: The Editor) .Tel.(08)-274-7500 , FAX: (08)-2727-597 . [email protected]

– International Mineral Club I .T. N. M .CThe International Thumbnail Mineral Club is an International Mineral Club whose members trademinerals and fossils by mail. Members in 16 Countries around the World. Thumbnail News is the bi-monthly Newsletter full of News , articles , letters from members. A members updated list and muchmore. There is a membership directory with member names , addresses , trading stock and want list.Membership is US $ 16 in North America and US $ 20 overseas air mail. This will cover: TheNewsletter Directory and access to the yearly mail auction.For more information please write to: D. Jorgensen ,6853 W. Abrahamson Rd., Ludington , MI49431-9402 , USA and do not forget to mention that you read about I.T.N.M.C. in

-NEWS ON MINERALS.,

International Thumbnail Mineral Club (I. T. N. M. C.) , , .

: D. Jorgensen , 6853 W. Abrahamson Rd. Ludington , MI49431-9402 , USA .C.

-NEWS ON MINERALS.-GEOMARKET- -GEOMARKET-

- MINERAL SPECIMENS- Calcite, Lavrion ,Hellas. Very nice coralloid calcite , various sizes. From 30 EURO.- Smoky quartz , Macedonia , Hellas . ,very nice smoky quartz xls 20 EURO each.- Annabergite (Mg-variety Cabrerite) , Lavrion , Hellas. Unique emerald-green silky xls onmatrix. 12-15 cms across. Very rare specimen . 250 EURO.- Slag specimens , Lavrion , Hellas. Slag specimens 3000-5000 years old with vugs filled withminerals in small perfect crystals. 15 EURO each. Minimum 10 slags.* Also nice mineral specimens from Lavrion for collectors from 15 € each (azurite , baryte ,fluorite , smithsonite , malachite. dog-teeth ankerite and other species).** Please add for postage and handling , depending on the weight of the specimens and the way ofshipment (Air or Surface Mail) . --- European Union ( ) Residents add 19% V.A.T. on total cost.






( )-MINERAL POSTCARDS(LAMINATED)

set of 15 color high quality mineral postcards depicting the following mineral specimens fromvarious localities around the world : 1. Sapphire 2. Ruby 3.Emerald (Facetted) 4 . Pyromorphite5. Pyrrhotite on Calcite 6. Rhodochrosite + aegirine + genthelvite 7. Cubanite xls 8. Pyrite crystals9. Quartz , variety , amethyst- sceptre habit 10. Serandite 11. Diopside on grossular 12. Native gold13. Lazulite + quartz + siderite 14. Amethyst 15. GypsePrice 45 EURO Air Mail post paid.

CD-ROMs on Earth Science- CD-ROMs * The Theory of Plate Tectonics 75 €* Illustrated Dictionary of Earth Sciences 50 €* The Wonders of Rocks and Minerals 75 €* The study of minerals 90 €* Plate Tectonics and how the Earth works 75 €* Environmental management of Mineral Exploration Activities for Field Personnel 95 €* Life in Amber 85 €* Explore the World of Modern UV-visible Spectroscopy 60 €* The Photo-Atlas of minerals 95 €* Hands-On Mineral Identification 40 €

European Union Residents add 19 % V.A.T.BOOKS - - BOOKS - - BOOKS - - BOOKS

-The complete handbook for Gemstone Weight Estimation , 1998 ,by Charles . Carmona , 427 pages . 120 EUROS post paid.-Collecting and classifying coloured diamonds ,1998 , by Stephen C. Hofer ,742 pages , 400 EUROS post paid.-ROUGH DIAMONDS , A PRACTICAL GUIDE , 1998 , by Nizam Peters , American Institute ofDiamond Cutting , Inc. ,172 pages. 150 EUROS Post Paid.European Union Residents add 19% V.A.T.

GEMSTONES - Peridot (Gem Olivine) : Gem rough facetting material transparent , excellent quality fromPakistan. USD$1.00 up to US$8.00 per gramRose Quartz cabochons , 30 X 40 mm (Grade AAA , South African material ) : 4 EURO per piece.Also other gemstone cabochons available.Lapis Lazuli Afghanistan-Pakistan: Rough , Mineral Specimens for collectors including LapisCrystals on Matrix + many other items.Excellent brown-red ZIRCON crystals on Rock matrix from Pakistan; The specimens are fromremote areas of this Country and range in sizes from T/N to Cabinet . Please enquire.Gem Rough facetting Emerald from Brazil or Africa depending on what isavailable in the market for delivery.

- MINERAL POSTAGE STAMPS :** Mineral Wealth of Hellas , Mint Set , 7 stamps (1980) 10 EURO ppd** First Day Cover (F D C) 12 EURO ppd.** Maximum Cards on the same topic 75 EURO ppd (Total number of sets in circulation 500)

SHOWS - NEWS - - USA ,Tucson ,Arizona : 9-12 February 2006 . 52nd Annual Tucson Gem and Mineral Show.Information : Tucson Gem and Mineral Society Show Committee – P.O.Box 42543 , Tucson , AZ85733 , USA Tel. +1-520-322-5773 , FAX: +1-520-322-6031

Spain , Barcelona : 3-5 March 2006 , Mineral and Fossil Show .Info: Mineralogy Club ofCatalonia

Italy , Bologna : 10-12 March 2006 .Mineral ,Gem and Fossil Exhibition. Palazzo deiCongressi , Piazza della Constituzione 4/a.Info: Maurizio Varoli Tel/FAX: +39-051-6148006 , Cell338 6291595 , www.bolognamineralshow.com , [email protected]

http://www.bolognamineralshow.com



Brazil ,Governador Valadares, 15th-17th March 2006 : 10th Brazil Gem Show .Information : [email protected] www.brazilgemshow.com

Helvetia , Luzern , 1-2 April 2006 : Mineral and Fossil Show ,Lumag Halle , Allmend Info:SVSMF Lucern section , [email protected] , www.mineralien.ch

Italy – Verona :19-21 May 2006 ,Verona Mineral Show .Info: A.G.M.V. Tel. 045-522492,FAX: 045-522 454 , [email protected] , www.veronamineralshow.com

France , Sainte-Marie aux Mines ,22-25 June 2006 . Info: Michel Schwab , Tel.+33-389-505151 , FAX: +33-389-511-990 , www.euromineral.net , [email protected]

Germany , Munich , 3-5 November 2006 : International Mineral ,Gem and Fossil Show .Info: MMFG Postfach 1361 , D-82034 Oberhaching , Mr. Joh. Keilmann , Tel: +49-896134711 ,FAX: +49-89.6135400 , [email protected] , www.mineralientage.com

Greece , Athens: 20th GeMin 2006 , 25-26 November 2006 . Information : GeMin , c/oORYKTOLOGIKA NEA - NEWS ON MINERALS , 70 Queen Sofia Avenue, Piraeus, EL-18532, Hellas.Tel+30-210-4171-680, FAX:+30-210-4132-570 , e-mail : [email protected] ,http://users.hol.gr/~minat/infogem.htm

PALEONTOLOGY , MINERALOGY : Some of your best contacts :USA : Fossil News, Journal of Avocational Paleontology , Lynne M. Clos, Editor, 1185Claremont Dr. , Boulder, Colorado USA 80303-6601 - http://www.fossilnews.com• Paleontologia em Destaque , Editor: Marco Aurelio Vicalvi , Depto. De Geologia/ IGEO/

CCMN/ UFRJ , Av. Brigadeiro Trompowsky , s/n , Cidade Universitáriá , Iiha do Fundão ,CEP 21.949.900 , Rio de Janeiro , RJ , Brazil . E-mail: [email protected] ,

• Site : http://www.acd.ufrj.br/geologia/sbp/sbp.htm• A new on Paleontology from Brazil : http://www.paleo.cjb.netUSA: Fossil Sites : http://home.att.net/~e.j.swearengin/fossils.htm

SLAG MINERALS – *Hellas + South Africa + Germany : (International Association of Collectors of Slag Minerals - IACSM - Founded in 1986 by

NEA-NEWS ON MINERALS). + + : Join the International Association of

Collectors of Slag Minerals and keep informed with Slag Mineralogy , Slag Minerals and Collectors ofSlag minerals from around the World. You can write either: - NEWS ON MINERALS , 70 Queen Sofia Avenue , Piraeus EL -185 32 ,Hellas. Tel. International : +30-210-4171-680 , FAX:+30-210-4132-570 e-mail : [email protected] ,http://users.hol.gr/~minat S. AFRICAN MICROMOUNT SOCIETY, P.O. Box 17273 , Groenkloof, Republic of South Africa ARGE Schlackenneubildung , c/o Mr. Elmar Nieding , Konstantine - Noppel Strasse 25 ,D -7760, Radolfzell –Germany*Recently we have received a letter from the Editor of IACSM , Mr. Horst Windischsaying that the edition of the the IACSM Newsletter will be delayed ,we hopetemporarily. Already due to the efforts of the last 15 years quite a few Slag MineralCollectors constitute a dynamic potential which will take over the continuation andcoordination of this effort started back in 1986 by ORYKTOLOGIKA NEA-NEWS ONMINERALS .Until a new editor will take over the continuation of the IACSM Newsletter , all SlagMineral collectors can send news ,articles ,exchange lists etc to ORYKTOLOGIKA NEA-NEWS ON MINERALS for publication.From India- : Journal of Gem Industry.Your best contact with India GemIndustry. "Journal House", A-95 Janta Colony,Jaipur 302 004 , India. Tel.91-141-614-398 , 610906 , 618002, 602900 FAX : 91-141-602973 , 564260 , 568233,[email protected] website : http://www.diamondworld.net andhttp://www.gemjournal.com . Editor Mr. Alok Kala


http://www.brazilgemshow.com


http://www.mineralien.ch


http://www.veronamineralshow.com

http://www.euromineral.net



http://www.mineralientage.com


http://users.hol.gr/~minat/infogem.htm

http://www.fossilnews.com


http://www.acd.ufrj.br/geologia/sbp/sbp.htm

http://www.paleo.cjb.net

http://home.att.net/~e.j.swearengin/fossils.htm


http://users.hol.gr/~minat


http://www.diamondworld.net

http://www.gemjournal.com


Exchange of Minerals- - from UK: Mr. Steve Bown , 26 Mendip Heights , Didcot,

Oxfordshire OX11 7TB- UK , is a newcomer in the Collection of Micromounts and wantsto contact other Micromounters in Hellas and other Countries. A warm welcome to Steve ,who deserves a welcome accompanied by some micros donated to him to help himmove forward.

- From Hellas : O . , 23 EL-17673. -Mr. Michalis Samouhos , Meghistis 23, Kallithea , EL-17673,

HELLAS, wishes to exchnage minerals with collectors from all over the World. -From Italy : Mr. Fabio Bigazzi ,Via dell'Acqua Ghiaccia, 4 - Fontana -

53038 Staggia Senese - Si - Italy - [email protected] , exchanges minerals withcollectors around the World.

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GEOCONGRESS 2006 WORKSHOP:"INTERNATIONAL JOURNAL OF GEOENGINEERING CASE HISTORIES: CASE

HISTORIES IN THE INFORMATION AGE" , Hyatt Regency Hotel AtlantaAtlanta, Georgia, Sunday February 26th, 2006, 8:30 am to 12:00 pm

We have received the following information from Mr. Dimitrios Zekkos [Dimitrios Zekkos<[email protected]> ]

Dear colleagues,We would like to invite you to participate in the workshop "International Journal ofGeoengineering Case Histories: Case histories in the information age". The workshop willbe held as part of the ASCE GEO-INSTITUTE Geo-Congress 2006 conference in Atlanta,Georgia, on Sunday February 26th, 2006 from 8:30 am to 12:00 pm.The workshop aims to explore the means by which case histories can be more effectivelydocumented and promoted so as to better serve the research and practice of ourProfession.The workshop will include talks by Professor I. M. Idriss, Dr. R. Bonaparte, Professor S.Prakash, Professor J. D. Bray, Professor E. Kavazanjian, Jr. as well as representatives ofgeoengineering associations such as the ISSMGE, ASCE-GEOINSTITUTE, AEG and/orIAEG, ARMA and/or ISRM, DFI and USUCGER.Participation is available at no cost without prior registration. However, registering forthe workshop ensures that you will receive a printed copy of the documentation that willbe distributed in the workshop. Please only register if you are sure that you will bepresent in the workshop.The results of the workshop will be announced through the Geoengineer website.If you intend to participate in the GEOCONGRESS 2006 conference, we will be glad to seeyou in the case histories workshop.For more information and registration :http://www.geoengineer.org/interestform.html

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-Are you interested to exchange mineral specimens with other collectors ? Just send anote which will be published in ORYKTOLOGIKA NEA-NEWS ON MINERALS.



http://www.geoengineer.org/interestform.html


GeMin , Your Mineral ,Gem , Jewellery and Fossil Exhibition inSoutheastern Europe.

- Most of major European Mineral, Gem and Fossil shows take place in Western Europe . GeMinshow in Athens ,Hellas , is the unique event of its kind which covers the Mineral, Gem , Jewelleryand Fossil activities , Industry and Earth Sciences and fills the gap in Southeastern Europe.ORYKTOLOGIKA NEA-NEWS ON MINERALS is widely known that sponsors the GeMin showsince 1987 , but our publication has and will continue to support within its possibilities any effort onEarth Sciences and especially on Minerals, Gems and Fossils. We always believe that this is the onlyway to enhance the Sciences of Mineralogy , Paleontology in the form of hobby as well as enhancethe Gem Industry. It is the least acknowledgement to all those people who look for minerals ,gemsand fossils in the remote areas of the Earth and bring them in front of Collectors at various Shows. Itis the least acknowledgement to all those suppliers of Gem Rough and superb Mineral and FossilSpecimens from around the World.One of the most striking features of Athens GeMin show is its substantial sales potential as Hellasis one of major tourist destinations in the World and apart from collectors in Hellas ,thousands ofcollectors come as tourists and buy minerals, gems and fossils. Companies have realized this and sothere is an inflow of material every year in the Market here.- GeMin show is the most comfortable show in Europe as the organizing Committee takes care forthe comfortness both the Exhibitors and the visitors. A great deal of superb specimens ,gems andfossils are expected to be on display during 20th GeMin 2006 to be held in Athens on 25-26November 2006 and we invite all to be present in this big event in Athens either as Exhibitors or asVisitors.-Another parameter which is seriously taken into consideration by the Organizing Committee ofGeMin is the junior section : The future are the pupils ,the students and in general the youngergeneration of collectors ,so schools are urged and invited to visit GeMin ,so young people have thechance to come across with mineral specimens, gems and fossils but also with educational productson Earth Sciences.GeMin Exhibition and ORYKTOLOGIKA NEA-NEWS ON MINERALS was present with their standboth in Tucson 2005 and Las Vegas 2005 (Mirage Hotel) sending an Invitation to the InternationalMineral, Gem and Fossil Community through these two major North American Shows that GeMinand ORYKTOLOGIKA NEA-NEWS ON MINERALS are all they need to expand business activitiesin the Market of Southeastern Europe centered on Athens ,Hellas. We thank PANAMERICANENTERPRISES and Mr. Paul Page for this Courtesy.

: - NEWS ONMINERALS.

Use the friendly phrase : I found you in ORYKTOLOGIKA NEA-NEWS ON MINERALS : 25 26 2006 20 GeMin 2006 ,

, .

Do not forget : 25-26 November 2006 is the 20th GeMin 2006 International Mineral,Gemstone ,Jewellery and Fossil Exhibition in Athens.


PERIDOT, the gemstone variety of olivine- ,

1 2

3 4

5 6 7

: Mg2SiO4 (Mg,Fe)2SiO4 Fe2SiO4

: :

)

1 and 2 Gem Olivine (Peridot) fromPakistan. 3 Olivine in Basalt , USA.4 Mineral Postage stamp “Terres Australeset Antartiques Françaises” depictingOlivine . 5 Facetted gem olivine (peridot)from Central Hellas (Greece). 6 Gem Olivine(Peridot) necklace Made in Hellas(Greece).Courtesy “ - Design –Evagghelia”. 7 Brooch made of Peridot ,milky quartz and garnet ,China.


Peridot (Pear-ih-doe) is the gemological name for the mineral Olivine ([Mg, Fe]2SiO4). Gem-gradeperidot is usually close to the Mg end-member (12-15% Fe2SiO4 present) of olivine; the Fepresent is a chromophore that gives a dark or medium yellowish-green color. Some of the best,brightest green peridot contains traces of Ni or Cr, which are also chromophores. Peridot is abirthstone for August, along with sardonyx. The name Chrysolite is an older German name thatwas once applied to all gem olivine; the term is not as commonly used today but is sometimesused to denote a more yellowish-green to greenish-yellow stone, as opposed to a dark yellow-green or brownish green (olive green) common to peridot. Peridot is sometimes also referred toby jewelers as "evening emerald".The name peridot is from the French peritot, meaning unclear, and is probably with illusion to thepresence of numerous inclusions. Though flawless stones of smaller size (up to about 5 carats)are common (far more common than flawless emerald of similar size), larger clear stones are rare.

PropertiesCrystal System: OrthorhombicHabit: Crystals very rare; usually massive, nodular.Hardness: 6.5-7Toughness: fair to goodCleavage: 1, imperfect, parallel to c-axis.Fracture: conchoidalSpecific Gravity: 3.3-3.4R.I.: 1.650-1.690Birefringence: moderate, 0.0036Dispersion: medium, 0.02Pleochroism: weak to noneColor: yellowish-green to greenish yellow; tone correlated with Fe content. Fe contents above15% give a very dark or muddy color.U.V. Fluorescence: none

Distinguishing PropertiesFrom green tourmaline by lack of dichroism, R.I.From green zircon by R.I., lower birefringence, and S.G.From emerald by color (more yellow in peridot) and inclusions, R.I.From green glass with polariscope.

SourcesOlivine is restricted in occurrence to metamorphosed impure dolomites and to basic or ultrabasic(low in Si, high in Mg and Fe) igneous rocks. Nearly all gem peridot is derived from the latter.Unlike most other gems, olivine is highly susceptible to chemical weathering and thus does notsurvive very long at the surface in wet climates. This fact probably accounts for the very limitednumber of known gem localities, and their restriction to areas having arid or semi-arid climates.Most gem peridot, in fact, has its source from three localities: Zagbargad Island (also know as St.Johns Island) in the Red Sea; Myanmar (Burma); and Arizona.Zagbargad Island (Egypt), Red Sea - ancient source; mentioned by Pliny in 1500 BCIn veins that cut ultramafic rock (peridotite, dunite)Mines originally worked by primitive methods; were improved prior to W.W.I. $2 million mined in4 year period preceding W.W.I. Mines nationalized in 1958. Little or no mining currently takingplace.Peridot Mesa, San Carlos Apache Reservation, Gila Co., Arizonauntil very recently, 80-95% of world peridot production was from this localityFrom ultramafic nodules in basalt; small, granular crystalsExclusive mining rights held by various Apache familiesInclusions include glass blebs, chromite in "lotus leaf" habitCrystals typically small (1/4-1/2"), yielding gems of 2 carats or less. Gems over 5 carats rare.Myanmar (Burma), north of Mogok Stone TractBright green euhedral crystals in weathered serpentine (ultrabasic rock). Renowned for color,considered the finest peridot in the world.Have a "sleepy" appearance due to numerous small crystallite inclusions.Once an important source, not presently.OthersNew Mexico (Kilbourne Hole), Pakistan, Mexico (Chihuahua), Norway, Ethiopia, Australia, China,South Africa.


Shaping and treatmentStep or brilliant cuts. Lotus leaf inclusions in larger pieces may be placed parallel to table to givean attractive, iridescent sheen. No information on treatment, if any.Peridot is relatively soft and can be easily scratched if set in a ring. Some material is also quitesensitive to rapid temperature changes, an important consideration when mounting or repairingperidot jewelry.

Pricing and valuationIncluded or flawed stones not worth much. Best stones are flawless, with good yellow-greencolor. Stones of this character in 1-10 carat sizes run about $20-$100/carat; in 15 carats or larger$70-$250/carat. Brownish green colors and included stones are $1-10 carat in all sizes. Althougha beautiful gem material in its own right, peridot prices suffer from comparison with other greengems, emerald in particular, which commonly have a more desirable bluish tint with less yellow.Both Burmese and Egyptian peridot are regarded by most connoisseurs as superior in color toArizona peridot. This, as well as limited production from these areas, translates to higher prices.Larger gems (10 carats or more) show a better depth of color than do smaller ones. Fine Pakistaniperidot has also sold at a premium, fetching as much as $300/ct for gemstones larger than 20carats. Pakistan Deposits: The new mine is located 15,000 feet above sea level in the NangaParbat region in the far west of the Himalayan Mountains in the Pakistan(Courtesy : Department of Geological Sciences, The University of Texas at Austin ,USA.http://www.geo.utexas.edu/courses/347k/redesign/gem_notes/peridot/peridot_main.htm )

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http://www.geo.utexas.edu/courses/347k/redesign/gem_notes/peridot/peridot_main.htm

http://www.geo.auth.gr


BASIC INFORMATION ON DIAMONDS - , ,

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REAL DIAMONDS AND SIMULANTS –

1 2 31 9 2 2 3

1 VVSI (Blue diamond)(9K yellow Gold ring with 1 carat (2 carats VVSI brilliant diamond)Diamond)

4 5 64 1 5 6 White cubic zirconium(One carat white sapphire) (White zirconium) ( )

7 87 Moissanite- 8 Swarofksi brilliant cut diamond

The Swarofski brilliant cutdiamond in photograph 8weighs 360 grams or 1800carats and make it anattractive stimulant of realdiamond suitable for display topromote Gem Industry andeducate people on diamondcutting.


The word diamond comes from the ancient Greek word adamas ( ), meaning unconquerable orunbeatable.Among the best diamonds are the colorless diamonds while attractive or brown diamonds are rare, and classedas fancy coloured , slightly brownish stones (off-white) are slightly less common than slightly yellow, and offerreasonably priced alternatives to colourless stones.Diamond inclusions are characteristics that occur inside a stone. They are usually called flaws, because theirpresence means the diamond is not perfect. The inclusions in emeralds are called jardins . Although flaws indiamonds may affect the clarity••• of a diamond , inclusions are like fingerprints, a characteristic that gives usall a special signature.[•••a term used to describe the absence or presence of a gemstone's internal and external flaws. A perfectstone with perfect clarity (clearness) is rare, although some flaws cannot be seen without using a loupe formagnification ]. There are many types of diamond inclusions and the purchase of a diamond ,which is aninvestment , should be made by an experienced person or relied to a well known firm . In any case the buyershould always ask a Certification of Authenticity for his diamond. Recently it is common that major diamondsellers write a number with laser on the diamond , so even if the diamond is stolen ,it can be identified from itsnumber written on it.

There are three types of gemstones: Natural, Synthetic, and Simulant.

Natural (also called genuine) gemstones include minerals and organic materials such asemeralds, rubies, sapphires, amber, coral, fossil, ivory, cultured freshwater pearls and naturalsaltwater pearls. Synthetic and Simulant are terms used by the USBM for laboratory growngemstones. Others in the gemstones industry may use different terms to refer to laboratorygrown gemstones.

Laboratory grown synthetic gemstones have essentially the same appearance and optical,physical, and chemical properties as the natural material that they represent.

Laboratory grown simulants have an appearance similar to that of a natural gemstone but havedifferent optical, physical, and chemical properties. Colored and colorless varieties of cubiczirconia are the major simulants produced.-In the past few years, the use and consumer acceptance of synthetic and simulant gemstoneshas grown. Much of this growth is the direct result of the recognition of these gemstones fortheir own merits, not just as inexpensive substitutes for natural gemstones.

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Tips on cleaning faceted stones and cabochonsBy Lesa Foster

When trying to get the best out of your natural stones, remember that some stones are foundnaturally waxy in nature and no amount of cleaning will change that.-NEVER use an ultrasonic cleaner or steam cleaners on stones as it could damage them andrender them unusable. Also avoid any sudden temperature changes as they may make the stonesplit.-According to the lapidary journal, some jewelers have had great success polishing waxy beadswith red rouge polishing paste [Used for polishing and buffing goldfill, 14 karat gold, silver andother soft metals to a bright finish. Can be used on copper, brass or nickel.] and a cloth or softbristle brush. Others have reported good luck with warm, soapy water - no harsh detergents orhot water. If you wouldn't stick your bare hands in the water, don't put your stones in it either -if you ever have to clean an emerald, they respond best to plain water with no detergents at all.-Never scrub any stone - soft rubbing works best. As a final note, don't let the stone soak - somestones are very porous and may absorb too much water. The best way would be to keep thestone in hand and use as little water as possible. Make sure to rinse well as a soap residue willcloud the luster of the stone.-No matter how you clean the stone, dry thoroughly with a soft cloth to avoid scratches or adulling film.

(Courtesy : Master Wire Sculptor http://wire-sculpture.com , 1600 Clay Street ,Vicksburg, MS 39180,USA)

http://wire-sculpture.com


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nnual Fees : 35 EURO , Overseas: US $ 45-• U.K. JOURNAL OF MINES AND MINERALSInformation-News and Reports on British and other European Localities. Published twiceyearly. Three issues £ 13.50 (£ 16.50 Air Mail from U.K.) Remit to : Mrs J.C.Spence ,3 Oak TreeRoad , Bawtry , Doncaster , South Yorkshire , ENGLAND Tel: (0302)-710244• Mineraux & Fossiles LE GUIDE DU COLLECTIONNEURSubscribe now and keep in touch with French collectors and Geoscientists.Mineraux & Fossiles, 10 rue de Marignan, F-75008 Paris , FRANCE.• Schweizer Strahler Le Cristallier Suisse l Chavacristallas Svizzer Il

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ORYKTOLOGIKA NEA-NEWS ON MINERALS January-February 2006

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