| GEMSTONES of East Africa Burundi, Kenya, Rwanda, Tanzania and Uganda Bruce Cairncross Published by Struik...resources 12 Burundi 13 Kenya 14 Rwanda 16 Tanzania 17 Uganda 20 Gemological properties 21 A to...through Tanzania, Kenya, Ethiopia and into the Sudan - has blessed East Africa, Kenya and Tanzania, with...starting in what was then Tanganyika ( now mainland Tanzania) and then progressing to Kenya - I am proud to...countries are among the finest in the world. The region and its gems are particularly dear to my family |
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Keller, Peter C (1992) Gemstones of East Africa. Geoscience Press, Inc. |
Book |
| gemological wealth of East Africa. This unique region encompasses ·what may be the world's richest gem...gemologist and geologist, Dr. Peter Keller. Kenya and Tanzania are revealed in their full mineralogical splendor...chrome tourmaline are widely identified with the region. ( continuedon backflap) ♦ ♦ ♦ ♦ ♦ ~...Conclusion 11 Chapter 2. Diamond Deposits of Tanzania 15 Location 16 Geology 18 Mining 20 Properties...Northern Province, Tanzania 28 Ruby and Sapphire from Umba, Tanga Province, Tanzania 32 Sapphire from Kenya |
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(1992, June) Gems & Gemology Vol. 28 (2) Gemological Institute of America |
Journal (issue) |
| You, Donors FEATURE ARTICLE 80 Gem Wealth of Tanzania Dona M. Dirlam, Elise B. Misiorowski, Rosemary...ABOUT THE COVER: Over the last three decades, _Tanzania_-the subject of the lead article in this issue-has...of gem-quaLity diamonds, rubies, and sapphires, Tanzania is perhaps best known for its production of the...nation of Tanzania has great gem wealth. First known by Westerners for its diamonds, Tanzania emerged in...De Beers has reinstated diamond exploration in Tanzania, n e w gem materials such as transparent green |
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Sutherland, Frederick Lin, Zaw, Khin (2020) Mineralogy and Geochemistry of Ruby. MDPI. doi:10.3390/books978-3-03943-616-3 |
Book |
| the Australasian region. He works closely with his counterparts from the SE Asia region. He leads industry-CODES-funded...deposits from Montepeluez, Mozambique; Winza, Tanzania; Andilamena/Zahmena and Ampanihy/Toliara, Madagascar...Luc Yen, Vietnam; Jegdalek, Afghanistan; Morogoro, Tanzania. Metamorphic blue sapphire deposits included...triangular figure, it separated fields from Winza, Tanzania, Namehaca, Mozambique and Ampanihy and Zahmena...and Fe vs. V could roughly divide Myanmar and Morogoro area rubies, while ternary diagrams for Fe/Mg |
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Giuliani, Gaston, Groat, Lee, Fallick, Anthony, Pignatelli, Isabella, Pardieu, Vincent (2020) Ruby Deposits: A Review and Geological Classification. Minerals, 10 (7) 597 doi:10.3390/min10070597 |
Journal (article/letter/editorial) |
| Vatomandry; (2) Andriba; (Antsirabe-Antanifotsy region, Soamiakatra-Ambohimandroso; Ambohibary); (3) Zazafotsy;...Zazafotsy; Ankaratra (Antsirabe-Antanifotsy region, Soamiakatra-Ambohimandroso; Ambohibary); (3)IlakakaZazafotsy;...John Saul mine; Penny Lane; Aqua, Hard Rock). Tanzania: (10) Umba (9) Mangare (Rockland-formerly John...John Saul mine; Penny Lane; Aqua, Hard Rock). Tanzania: (10) Umba valley; (11) Longido, Lossogonoi; (12)...(12) Winza; Loolera (Kibuko); (13) Morogoro (Mwalazi; Visakazi; valley; (11) Longido, Lossogonoi; (12) Winza; |
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(2022) The Journal of Gemmology Vol. 38 (5) Gem-A |
Journal (issue) |
| Roman Empire (Part 1) Cobalt-bearing Spinel from Tanzania Nephrite Jade from Washington State, USA Copper...2022 Presentations Cobalt-bearing Spinel from Tanzania Nephrite Jade from Washingto n State, USA Copper...Cobalt-bearing Blue Spinel from Lukande, near Mahenge, Tanzania By Michael S. Krzemnicki, Alex Leuenberger and...the Ambatofinandrahna area of the Amoron’i Mania region in central Madagascar, where it was extracted from...iron-bearing phases mostly come from the Siberian region of Russia (Eaton-Magaña et al. 2019). To our knowledge |
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(1991, September) Gems & Gemology Vol. 27 (3) Gemological Institute of America |
Journal (issue) |
| John I. Koiv~il~i New Rubies from the Morogoro Area, Tanzania H. A. HLinni and I<. Schmetzer NOTES AND...years, rubies have emerged from new deposits in Tanzania and Vietnam that closely resemble Burmese stones...material that has recently emerged from the Morogoro area of Tanzania. The loose rubies and fancy sapphires...economic outlook of countries such as Vietnam and Tanzania, promises both new markets and new gem materials...the historic deposits in the Bohemian Hills. In Tanzania, we have seen mining expanded, leading to the |
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(2015, October 15th) The Rainbow of Africa Gem & Mineral Collection. Heritage Nature & Science Auction 5236. Heritage Auctions |
Catalog/List |
| the Tsumeb Mine (as well as other mines of the region) were still in production in the 1970s. You will...Azurite Level 8, Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia If the attachment point on the back of...Spitzkopje, Spitzkopje Area, Karibib District, Erongo Region, Namibia Klein Spitzkopje in Afrikaans means: the...Pseudomorph after Azurite Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia Some of the best things to come from the...Epimorph on Cerussite Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia The multiple stages of mineralizing fluids |
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(2017) The Journal of Gemmology Vol. 35 (5) Gem-A |
Journal (issue) |
| Ceruleite from Chile|Yellow danburite from Namalulu, Tanzania |
Emerald from Ethiopia |
Vivid purplish pink fluorite...El Guanaco in the Taltal area of the Antofagasta Region, Chile. He kindly donated a 1.45 ct stone to Gem-A...1983.18.8.734. Yellow Danburite from Namalulu, Tanzania: Gemmological Properties and Chemical Composition...from granitic pegmatites in the Morogoro region of central Tanzania (Chadwick and Laurs, 2008). A few...86 ct) are from the Namalulu area of north-east Tanzania. Courtesy of the Somewhere In The Rainbow Collection; |
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(2008, January) Gems & Gemology Vol. 44 (4) Gemological Institute of America |
Journal (issue) |
| 322 Rubies and Sapphires from Winza, Central Tanzania Dietmar Schwarz, Vincent Pardieu, John M. Saul...“D-TO-Z” DIAMONDS diamonds from the Cape of Good Hope region, and “Jager” for colorless diamonds with strong...the blue region of the spectrum, as it is the absorption area of wavelengths in this region that allows...the 6-watt lamps used in the past. Here, the UV region shows good agreement between the three lamps. Note...that results in an additional emission in the red region between 620 and 700 nm that does not have a noticeable |
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(2011, Spring) InColor 16. International Colored Gemstones Association |
Journal (issue) |
| the tsavorite project in the Manyara region of northeast Tanzania, about 20 kilometers from its tanzanite...following similar actions taken by South Africa and Tanzania. The new firm is expected to be up and running...Attapeu.) This is the infamous “Golden Triangle” region, where the borders of Thailand, Laos, and Myanmar...so-called ”emerald belt” in the Itabira-Nova Era region (Figure 2). History The discovery of emeralds...emerald belt is located in the Santa Maria de Itabira region in the southwestern corner of the map. www.gemstone |
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(2017) The Journal of Gemmology Vol. 35 (8) Gem-A |
Journal (issue) |
| tourmaline from Mavuco, Mozambique|Tremolite from Tanzania |
Tsavorite from Ethiopia |
Black star CZ sold as...approximately 18 km southeast of Mogok (Figure 3). The region is mainly underlain by the Mong Long mica schist...documented in pink spinel from Mahenge in the Morogoro region of Tanzania (Gübelin and Koivula, 2005, p. 682)....and Rubaya, which are both located in the Masisi region of North Kivu Province. Although Hashmi has not...there in 2016. The other mining area in the Masisi region, called Rubaya, has been worked for the past few |
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Voudouris, Panagiotis, Karampelas, Stefanos, Melfos, Vasilios, Graham, Ian - Eds. (2020) Mineralogy and Geochemistry of Gems. MDPI. doi:10.3390/books978-3-03928-077-3 |
Book |
| Element Characteristics of Danburite from Mexico, Tanzania, and Vietnam Reprinted from: Minerals 2018, 8...Enigmatic Alluvial Sapphires from the Orosmayo Region, Jujuy Province, Northwest Argentina: Insights...as a late magmatic accessory phase from Mexico, Tanzania, and Vietnam. Differences in the rare earth elements...on another occurrence of sapphires in the same region of the South Urals occurring in anorthosites (kyshtymites)...evolution of alluvial sapphires from the Orosmayo region (Jujuy Province, NW Argentina) and importantly |
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O'Donoghue, Michael (2006) Gems : their sources, descriptions and identification (6th ed.) Butterworth-Heinemann. |
Book (edition) |
| an inner solid region of diameter 2440 km and density about 8 gcm3, and an outer region about 2260 km...alumina, alkalis and the rarer elements. If the region is quiescent and all the magma solidifies in the...if about half way through crystallization, the region becomes 8 Rocks and the Processes That Formed... More recently, it has been found that where a region is saturated with water, jadeite can form in veins...fluid–rock combinations has generated tremolite-actinolite amphiboles rather than jadeite. Such combinations |
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Moore, T.P. (2016) Moore's Compendium of Mineral Discoveries 1960 - 2015 Vol. 2. Mineralogical Record Inc. |
Book |
| localities for good ilmenite crystals exist in the region (Brunet, I 977b ). NEW YORK Amity, Orange County...especially during the 1970s (see this entry for Actinolite, Fluorapatite, Prehnite, Pumpellyite). Ilmenite...in Switzerland, it is only in the Maderanertal region of east-central Canton Uri that clefts bearing...clefts are found fairly commonly throughout this region, such that only a handful of notable finds during...about 20 other quartz mines are operated in the region of the Subpolar Urals, northwest of Saranpaul, |
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Hughes, Richard W (1990) Corundum. Butterworths. |
Book |
| Cambodia, Sri Lanka, India, Australia, Kenya, Tanzania, Montana and North Carolina (USA), Nigeria, Afghanistan...continuously since Roman times and before; much of the region was later colonized by the European xi xii Introduction...Westemization. Even so, today the East remains an alien region for Western travellers, more foreign, in fact,...USA 96 Ruby - Kenya 97 Sapphire - Umba Valley, Tanzania 98 Bibliography 99 Chapter 6 Treatments 100...Bibliography 295 East Africa (Kenya and Tanzania) 295 Kenya 296 Tanzania 298 Bibliography 300 Montana, USA |
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(2006, June) Gems & Gemology Vol. 42 (2) Gemological Institute of America |
Journal (issue) |
| from Afghanistan • Uvite-dravite tourmaline from Tanzania • Triploidite from China • Väyrynenite from Afghanistan...2 2 4 2 3 2 Sri Lanka East Africa Madagascar Tanzania Madagascar East Africa 1.56–3.87 0.47–2.31 0...Terezinha overlapped to various degrees in the Zn-Li region. The alkali granite–related Kaduna emeralds of...containing phlogopite, biotite, talc, carbonate, and _actinolite_-tremolite (Schwarz et al., 1996). Their contents...and II are expanded here to show the “nitrogen _region_” at 1300–800 cm−1. The slight hump in the spectrum |
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Hughes, Richard W. (1997) Ruby & Sapphire. RWH Publishing. |
Book |
| Bibliography-Sweden 4 10 410 Bibliography- Switzerland 4 I 0 Tanzania 410 The Mozambique Orogenic BelrEasr Africa's...The corundun1 mines of the Thai/Cambodian border region straddle the border. Thus the phrase "Thai ruby"...round from North Carolina and a 1.87 et oval from Tanzania. (Photo: Harold & Erica Van Pelt/ American Museum...incellectually asleep. apparencly refers co the Araka.n region of present-day Burma. RUBY & SAPPHIRE 37 Chapter...particularly those from che Thai/Cambodian border region, are faceced with overly shallow pavilions. In |
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(2013, October 19th) The Hoppel Collection of Fine Minerals Auction 2. Heritage Nature & Science Auction 5141. Heritage Auctions |
Catalog/List |
| Touissit District, Oujda-Angad Province, Oriental Region, Morocco This is just a nice, reasonably intact...Washington, USA Named in the 1850’s for the Autun region of Burgundy in France, Autunite is a commonly found...Kavalerovo Mining District, Primorskiy Kray, Far-Eastern Region, Russia Other than a dacha on the Black Sea, this...ZIRCON Ural Mtns., Chelyabinsk Oblast’, Urals, Urals Region, Russia Zircon, is a naturally occurring Silicate...Kavalerovo Mining Dist., Primorskiy Kray, Far-Eastern Region, Russia The rugged terrain of the Dal’negorsk District |
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