 | | Book | | 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 |  | | Catalog/List | | Signature® Internet Session 2 Heritage Auctions Design District Annex 1518 Slocum Street • Dallas, TX 75207 (HERITAGELive...the Tsumeb Mine (as well as other mines of the region) were still in production in the 1970s. You will...village near the foothills of the Drakensberg Mountains, in South Africa. His love of rock climbing soon...an exciting trip by Land Rover into the Maluti Mountains of Lesotho (formerly Basutoland) to visit the...Azurite Level 8, Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia If the attachment point on the back of |  | | 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) ♦ ♦ ♦ ♦ ♦ ~...including a 27.03-carat yellow scapolite, a 7.02-carat purple scapolite, a 34.60-carat malaya garnet,...Conclusion 11 Chapter 2. Diamond Deposits of Tanzania 15 Location 16 Geology 18 Mining 20 Properties |  | | 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...of zoisite, tanzunite, which occurs in the Merelani Hills. The superb transparent tanzanite crystal shown...nation of Tanzania has great gem wealth. First known by Westerners for its diamonds, Tanzania emerged in |  | | Journal (issue) | | (5) Chrysoberyl, 2.3 cm, from Takovaya, Ural Mountains, Russia. (6) Chalcocite, 2.5 cm, from Cornwall...Miask, Ural Mountains, Russia. (8) Pyrargyrite, 1.8 cm, from St. Andreasberg, Harz Mountains, Germany....Dyscrasite twin, 1.9 cm, from St. Andreasberg, Harz Mountains, Germany. (3) Glaucodot twin, 2.5 cm, from Håkansboda...Harz Mountains, Germany. (5) Elbaite, 2.5 cm, from Sarapulka, 12 km from Mursinka, Ural Mountains, Russia...Aquamarine beryl, 2.4 cm, from Slieve Corra, Mourne Mountains, County Down, Ireland. Gem-crystal thumbnails |  | Giuliani, Gaston, Fallick, Anthony E., Feneyrol, Julien, Ohnenstetter, Daniel, Pardieu, Vincent, Saul, Mark (2011) 18O/16O and V/Cr ratios in gem tsavorites from the Neoproterozoic Mozambique metamorphic belt: a clue towards their origins?. Mineralium Deposita, 46 (7) 671-676 doi:10.1007/s00126-011-0355-6 | Journal (article/letter/editorial) | | main productive areas from northern and southern Tanzania, Kenya, and Madagascar. Three consistent sets...Saul Swala Gem Traders, Sokoine Road, Arusha, Tanzania deposits hosted in graphitic gneisses related...discovered by Bridges in 1967, in northeastern Tanzania, is among the most successful recent gemstones...significant tsavorite deposits are found in Kenya, Tanzania, and Madagascar. The geology of the deposits has...partly in the Voi region in Kenya (Pohl and Niedermayr 1978) and Merelani mines in Tanzania (Malisa 1987; |  | Feneyrol, J., Ohnenstetter, D., Giuliani, G., Fallick, A. E., Rollion-Bard, C., Robert, J.-L., Malisa, E. P. (2012) EVIDENCE OF EVAPORITES IN THE GENESIS OF THE VANADIAN GROSSULAR 'TSAVORITE' DEPOSIT IN NAMALULU, TANZANIA. The Canadian Mineralogist, 50 (3) 745-769 doi:10.3749/canmin.50.3.745 | Journal (article/letter/editorial) | | VANADIAN GROSSULAR ‘TSAVORITE’ DEPOSIT IN NAMALULU, TANZANIA Julien FENEYROL and Daniel OHNENSTETTER§ Université...Dar-es-Salaam, P.O. Box 35052, Dar-es-Salaam, Tanzania Abstract The Namalulu tsavorite (vanadian grossular...up to 0.80 wt.% V2O3) deposit in northeastern Tanzania occurs in metasomatized graphitic gneiss overlain...anhydritegypsum-dolomite lens (lens I) and a calcite-scapolite-diopside-sulfides-graphite lens (lens II). This...kbar and 630 ± 30 °C. Keywords: Mozambique Belt, Tanzania, Namalulu, tsavorite, vanadian mineralization |  | | Journal (article/letter/editorial) | | are from Namibia, South Africa, Zimbabwe, and Tanzania. All the fluorescent images were taken using a...contrast of the crystals. Figure 6. The Erongo Mountains have produced notable topaz specimens; many, not...Reproduced with permission Figure 5. The Erongo Mountains are world famous for producing aquamarine, schorl...(885 grams), from St. Anns mine, Mwami, Karoi district, Mashonaland West, Zimbabwe. This pegmatite has...permission Reproduced with permission East Africa: Tanzania Figure 15. A combination specimen, 1.8 cm, of |  | | Journal (article/letter/editorial) | | dolomite, quartz, clinozoisite, wollastonite, scapolite, vesuvianite, diopside, and tremolite (Anthony...the specimen probably originated in the Wah Wah Mountains, which are close to Milford. Zoned dodecahedral...cm on edge have been found in the Santa Rosa Mountains, Riverside County. Grossular found near Bishop...calcite, quartz, wollastonite, and an undetermined scapolite species. Far earlier, the locality was known for...Kimitoön, Western Finland Province, Finland Proper region, Finland, where lusterless dodecahedra of the iron-rich |  | | Book (volume) | | Morganite) (Red Beryl) Harris Claim, Wah Wah Mountains, Utah, 4 Bournonite (on Quartz) Yaoganxian Mine... Bahia, Brazil, 22 Cavradi Gorge, St. Gotthard Region, Graubunden, Switzerland, 49 Hyalophane Zagradski...Shattuckite), Omaue Mine, Kaokoveld Plateau, Kunene region, Namibia, 17 Mimetite Congreso-Leon Mine, San Pedro...Prov., Atacama Region, Chile, 28 Pyrargyrite Samson Mine, St. Andreasberg, Harz Mountains, Lower Saxony...Minas Gerais, Brazil, 48 Scapolite Uluguru Mts., Morogoro Region, Tanzania, 50 Selenite Naica, Mexico |  | Feneyrol, Julien, Giuliani, Gaston, Ohnenstetter, Daniel, Rondeau, Benjamin, Fritsch, Emmanuel, Fallick, Anthony E., Ichang'i, Daniel, Omito, Edward, Rakotondrazafy, Michel, Ranatsenho, Madison, Lallier, Florent (2014) New typology and origin of tsavorite based on trace-element chemistry. European Journal of Mineralogy, 26 (2) 293-308 doi:10.1127/0935-1221/2014/0026-2367 | Journal (article/letter/editorial) | | geographic provenance of economic tsavorite from Kenya, Tanzania and Madagascar. Key-words: tsavorite, green grossular...mined in placers from Sri Lanka, Madagascar and Tanzania (Giuliani et al., 2012). In other cases, such...northeastern Tanzania (Bridges, 1974). The economic deposits are located in Kenya, Tanzania and Madagascar...described tsavorite in nodules from the Sør Rondane mountains in Antarctica. The vanadium contents of garnet...Feneyrol, 2012), northeastern and southeastern Tanzania (Bridges, 1974; Malisa, 1987; Malisa & Muhongo |  | | Journal (article/letter/editorial) | | corundum occurs associated with meionite-rich scapolite, which bears crystallographically controlled acicular...in calcite matrix. Titanite, fluorapatite, and scapolite occur in variable abundance. The rock is generally...particularly the abundant pseudomorphs. Samples of scapolite and corundum, two minerals that exhibit complex...the unaltered, meionite-rich interior of the scapolite crystals (see fig.). Chemical mapping using X-ray...phlogopite, and marialite in alteration rinds on PDM scapolite. The irregularity of the alteration rind suggests |  | | Catalog/List | | 10:00 AM – 5:00 PM CT Heritage Auctions Design District Annex 1518 Slocum Street • Dallas, TX 75207 Session...5:00 PM ET LOT VIEWING Heritage Auctions Design District Annex 1518 Slocum Street • Dallas, TX 75207 Thursday...grow. 73001 TOURMALINE Momeik Township, Kyaukme District, Shan State, Myanmar (Burma) Looking almost like...com/6150 73002 TOURMALINE Momeik Township, Kyaukme District, Shan State, Myanmar (Burma) For those that have...750 73003 TOURMALINE Momeik Township, Kyaukme District, Shan State, Myanmar (Burma) As if Momeik doesn’t |  | | Report (issue) | | dolomite, epidote, clinozoisite, wollastonite, scapolite, vesuvianite, diopside, tremolite, quartz. Distribution:...Coahuila. Gems from the Merelani Hills, southeast of Arusha, Tanzania. In the Taita Hills, near Voi, Kenya. |  | | Journal (issue) | | 142 Well-Formed Tsavorite Gem Crystals from Tanzania Robert E. Kane, A n t h o n y R. I...nickel (depending on the color desired) into a region that extends just below the surface of the otherwise...permitted microprobe analysis of both the near-surface region affected by the diffusion treatment process, as...colorless part (spectrum a), and i n the outer blue region (spectrum b), of a diffusion-treated blue sapphire...LOCATION, AND ACCESS When the Spaniards arrived in the region that is now Guatemala (about 1519), Mayan chiefs |  | | Journal (issue) | | of Aurora Gems; (6) a 9.15 ct ruby from Winza, Tanzania, courtesy of Hakimi & Sons; (7) a 14.80 ct “golden”...were combined under the jurisdiction of the U.S. District Court of New Jersey 168 PRODUCTION AND MARKETS...Africa, and its interest in the Williamson mine of Tanzania. Soon after the Cullinan deal went though (July...Weldon, 2009). One new source of corundum, Winza in Tanzania, began yielding some fine-quality ruby in 2007...with the opening of a new mine in the Nova Era region and technological developments at established mines |  | | Catalog/List | | Internet, Fax, and Mail) Heritage Auctions Design District Showroom 1518 Slocum Street • Dallas, TX 75207...17656. LOT VIEWING Heritage Auctions Design District Showroom 1518 Slocum Street • Dallas, TX 75207...sky seemed ablaze above Siberia’s Sikhote-Alin Mountains. This frightening vision was accompanied by terrifying...Meteorite Slice Iron - IAB Complex Novosibirsk Region, Russia - (54° 20’N, 84°12’E) The find of the Maslyanino...Meteorite occurred on May 25, 1992 in the Novosibirsk Region of Russia, when an agronomist discovered a 26 kg |  | | Catalog/List | | Design District Showroom 1518 Slocum Street • Dallas, TX 75207 Heritage Auctions Design District Showroom...York Hayley Brigham Managing Director Beverly Hills Jim Halperin Co-Chairman of the Board Ed Beardsley...Otjisongati) Ogonja (Onganja), Seeis, Windhoek District, Khomas Region Namibia This faceted Cuprite is from a...Otjisongati) Ogonja (Onganja), Seeis, Windhoek District, Khomas Region Namibia This colossal Cuprite gemstone...- 11.94 Cts. Sweet Home Mine Mount Bross, Alma District, Park Co. Colorado, USA This adorable pink-red |  | | Catalog/List | | Internet, Fax, and Mail) Heritage Auctions Design District Annex 1518 Slocum Street • Dallas, TX 75207 LOT...LOT VIEWING Heritage Auctions Design District Annex 1518 Slocum Street • Dallas, TX 75207 Wednesday...include: • An incredibly unbelievable sculptural Merelani Pyrite: “The Tower or Mirrors”. • The Himalaya...Potrerillos, Diego de Almagro, Chañaral Province, Atacama Region, Chile Interesting mineral specimens seem to have...TOWER of MIRRORS” Merelani Hills, Lelatema Mts, Simanjiro District, Manyara Region, Tanzania Only within the |  | | Catalog/List | | Design District Showroom 1518 Slocum Street • Dallas, TX 75207 Heritage Auctions Design District Showroom...York Hayley Brigham Managing Director Beverly Hills Ed Beardsley Craig Kissick Jenny Milani Vice... Carthage Central Tennessee Ba—F—Pb—Zn Mining District Smith Co., Tennessee, USA Fluorite from Elmwood...500 72034 Chrysocolla Sphere Clifton Morenci District Greenlee County Arizona, USA This vibrant sphere...La Matilda Formation El Moyano, Puerto Deseado District, Santa Cruz Province, Argentina This wonderfully |  | | Book | | 139) Page 248: Quartz (amethyst variety), Erongo Mountains, Namibia * 5 x 6 x 3 cm Page 251: Calcite, Irai...Serbia ¢ tixex7 cm LEFT: Fluorite, Taihang Shan Mountains, Hebei, China * (Sexes selem 10 | MINERALS:...A CHANGING PLANET 11 Vanadinite, San Carlos district, Chihuahua, Mexico * 8 x 4 x 2 cm Mineral Species...hundred kilometers. Most of them orbit the Sun in a region called the asteroid belt, which is between the...such as Porcupine and Hemlo districts; Noranda district, Quebec. USA: Mother Lode belt and others in | | | Book | | 139) Page 248: Quartz (amethyst variety), Erongo Mountains, Namibia * 5 x 6 x 3 cm Page 251: Calcite, Irai...Serbia ¢ 11x8x7cm LEFT: Fluorite, Taihang Shan Mountains, Hebei, China * 19x13x1cm 10 | MINERALS: PRODUCTS...periods of stability PLANET | 114 San Carlos district, Chihuahua, Mexico * 8 x 4 x 2 om are uncommon...hundred kilometers. Most of them orbit the Sun in a region called the asteroid belt, which is between the...such as Porcupine and Hemlo districts; Noranda district, Quebec. USA: Mother Lode belt and others in |  | | Journal (issue) | | collecting has flourished throughout the Northwest region in recent decades; a history of the mineral discoveries...the estate. Many early minerals collected in the region about Spokane, Washington, are represented in the...“a new mineral store” in the central business district of Spokane, Washington, at W. 410 Riverside Avenue...and associated minerals from the Michigan copper district. This is an old time collection,” he said, “collected...him before his death. The company advertised as Hills Gems & Minerals beginning in May–June 1960. By January–February |  | | Journal (issue) | | points to the garnet's cradle in the Umba Valley of Tanzania. Tsavorite is orthographically completely wrong...terms tanzanite, for beautiful blue zoisite from Tanzania, and tsavorite, for the vibrant green grossular...for that term, since it also is gem zoisite from Tanzania. By the time Dr. Gubelin had pointed out to the...have just read your very interesting article on Tanzania in the Summer '92 edition of G &> G. I would,...Moriano, Lucca, Italy; Robert C . Fisher, Beverly Hills, MI; Diane Flora, San Diego, CA; Ralph L. Forrester |  | | Book (edition) | | Kiwi Topaz Malachite Green Gems (continued) Merelani Mint Garnet Moldavite Russian Diopside Trapiche...Morganite, Fire Agate, Mabe Pearl, Mookite, Rainbow Scapolite, Snowflake Obsidian and Spectrolite. Red-Pink...Eye Chrysoberyl Cat’ Eye Danburite Cat’s Eye Scapolite Champagne Diamond Chondrodite Cinnamon Zircon...ee ——.\ Alluvial gold miners in Russia’s Ural Mountains in the early 20" century. It was from deposits...NIGERIA e— TAHITI Tahitian Pearl BRAZIL Agate TANZANIA Amethyst AAA Tanzanian Ruby AAA Tanzanite Alexandrite |
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Merelani Hills, Lelatema Mountains, Simanjiro District, Manyara Region, Tanzania