 | | 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 |  | | Book | | gemological wealth of East Africa. This unique region encompasses Ā·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) ā¦ ā¦ ā¦ ā¦ ā¦ ~...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 |  | | Catalog/List | | Ammoniotinsleyite xls Punta de Lobos, 90 km south of Iquique, I Region, Tarapaca / Chile; Pinkish crystals of up to 1...(xls) Arakawa, Minamiboso City, Chiba Pref., Kanto Region, Honshu Island / Japan / TYP; The extremely rare...Mwajanga Pegmatite, Mererani, Simanjiro District, Manyara Region / Tanzania; The rare and new mineral of...tourmaline crystals. These are mixed crystals from Dravite (brown), Elbaite (light green) and Darrellhenryite...(xls) Tsumeb Mine, Tsumeb, Otavi Mts., Otjikoto Region / Namibia; Ore-microscopic and via REM-EDX visible |  | | Catalog/List | | SignatureĀ® Internet Session 2 Heritage Auctions Design District Annex 1518 Slocum Street ā¢ 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 |  | | 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 HĆ„kansboda...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 |  | | 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 (article/letter/editorial) | | AND ASSOCIATED GEMSTONE MINERALIZATION AT MERELANI, TANZANIA C. HARRIS Department of Geological Sciences...to date, is the Merelani area of northeastern Tanzania, a structurally complex region consisting of granulite...rare minerals and gemstones (such as axinite, dravite, fluorapatite, prehnite and tremolite). The Ī“18O...tanzanite, tremolite, tsavorite and kyanite from the Merelani area are all high (average of 19.1, 19.5, 18.5...Graphite-free garnet-bearing gneisses from the Telele Hills, ~33 km south of the mining area, have much lower |  | | Journal (article/letter/editorial) | | crystals flattened along the c-axis to 5.5 cm; dravite as lustrous brown crystals to 1.5 cm; and calcite...crystallized, tan, massive material hosting tremolite and dravite crystals. MORE THAN MEETS THE EYE: FLUORAPATITE...INCLUSIONS IN GREEN MUSCOVITE FROM THE MERELANI HILLS, TANZANIA. J. Fink1, C. Emproto1, J. A. Jaszczak2...Beautiful green mica crystals from the Merelani Hills of northern Tanzania were sent to the authors by Simon...(EDS) shows the presence of minor vanadium in the Merelani mica crystals. Roscoelite is the V dominant analog |  | | Journal (article/letter/editorial) | | silicate rock at the type locality Merelani Hills, south of Arusha, Tanzania (Jobbins et al. 1975); albite...Institute of Chemical Technology, Praha in the spectral region from 400 to 4000 cm ā1 in a KBr tablet. Results...BliĀ nĆ” (NovĆ”k ā unpubl. data) and from Merelani Hills, Tanzania (Jobbins et al. 1975), respectively, but...Disregarding magnesioaxinite from the type locality Merelani Hills with Mg = 1.92, Fe = 0.00 and Mn = 0.07 apfu...Grew 1996); calc ā silicate rock from Merelani Hills, Tanzania consists of diopside, zoisite, grossular |  | | Journal (issue) | | 501-505 Pxy-vanadium-dravite : crystal structure and redefinition of the "vanadium-dravite" tourmaline 506-511...Microminerals of the Bellerberg volcanics, Eifel region, Germany 191-198 HaĆ¼y crystal models at the University...at Merelani [grafiet-XX met diopsied-XX !] 166-177 Diopside - Medrelani, Arusha region, Tanzania 179-183...Fluorapatite from the Karo Pit, Merelani Hills, Arusha region, Tanzania 184-189 Raman Spectroscopy in the...Zoisiet, var. "tanzaniet" van Merelani Hills, Lelatema Mts, Arusha-gebied, Tanzania 4. Vivianiet van Huanuni |  | | Journal (issue) | | of Aurora Gems; (6) a 9.15 ct ruby from Winza, Tanzania, courtesy of Hakimi & Sons; (7) a 14.80 ct āgoldenā...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 |  | | Journal (issue) | | Rochester Min. Symp. (fluorapatite from Merelani Hills, Tanzania; Coarsely cristallyne calcite from the...the tanzanite-prehnite association from Merelani Hills, Tanzania). 184-187 The missing smokies ([Crystal...280-336 The Sar-e-Sang Lapis mines, Kuran Wa Munjan district, Badakhshan Province, Afghanistan 345-375 Tucson...tri-lacunary Keggin anion 1155-1162 Vanadio-oxy-chromium-dravite, a new mineral species of the tourmaline supergroup |  | | Catalog/List | | Internet, Fax, and Mail) Heritage Auctions Design District Annex 1518 Slocum Street ā¢ Dallas, TX 75207 LOT...LOT VIEWING Heritage Auctions Design District Annex 1518 Slocum Street ā¢ Dallas, TX 75207 Wednesday...include: ā¢ An incredibly unbelievable sculptural Merelani Pyrite: āThe Tower or Mirrorsā. ā¢ The Himalaya...Potrerillos, Diego de Almagro, ChaƱaral Province, Atacama Region, Chile Interesting mineral specimens seem to have...TOWER of MIRRORSā Merelani Hills, Lelatema Mts, Simanjiro District, Manyara Region, Tanzania Only within the |  | | Journal (issue) | | green chrome tourmaline from the Umba Valley (Tanzania) may show a wine-red colour when viewed in certain...Daluni area in the Umba Valley of north-eastern Tanzania. Several showed a startling green to orange or...and Henn (1988) described green tourmaline from Tanzania that exhibited a green/red alexandrite effect...the material was collected, with the Usambara mountains in the background. Gemmology Assuming a common...Liddicoatite Ca (Li,AI)3 Al6 B3 Uvite Mg3 Dravite 326 327 Na Ca AI5MgB3 Figure 1: General view |  | | Journal (issue) | | equally-famous Cruzeiro Mine, are located in a mountainous region of Minas Gerais, in Brazil. The Pederneira pegmatite...and black crystals, while schorl and probable dravite also occur in parts of the pegmatite. Accessory...locality. For two summers he hiked and explored the hills to the west of Colorado Springs, but with no success...mining partner, Jean Cowman. They hiked into the hills together where, usually, they would split up to...with tanzanite, crystal 6 cm high. Merelani Hills, Arusha, Tanzania. MIM collection. J. Elliott photo |  | | Journal (issue) | | Yellowish Green Enstatite (and Star Enstatite) from Tanzania | Sunstone Labradorite-Bytownite from Ethiopia...Renaissance painter Girolamo Mocetto, shows the region near Mount Vesuvius, which erupted in 79 CE and...Trapiche Ruby from Khoan Thong, Luc Yen Mining District, Northern Vietnam 726 By Isabella Pignatelli...an existing deposit such as those in the Karoi District or the Zambezi Valley (cf. www.mindat.org/ locentries...the blue towards an absorption edge in the violet region. A Raman spectrum obtained with a Thermo Scientific |  | | Book | | localities for good ilmenite crystals exist in the region (Brunet, I 977b ). NEW YORK Amity, Orange County...Mount Malosa, Chilwa alkaline province, Zomba district. "Illite" is the name of a series of incompletely...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...Discoveries, 1960-2015 ILMENITE AFRICA (Cherry) Mountains (Drnitriy Belakovskiy, personal communication |  | | Report (issue) | | town ofEhrenfriedersdorfin the Erzgebirge ("Ore Mountains") of southern Germany. The tin deposit in Ehrenfriedersdorf...apatite structure is complex and contains three district sites on which the cations sit. The calcium and...cm high lmilchil, Meknes-Tafilalet, High Atlas Mountains, Morocco Spirifer Minerals specimen, Jeff Scovil...include blue/yellow-green crystals from Merelani Hills, Tanzania; Slyudyanka, Russia; Mogok, Myanmar. ..."faden," 5.6 cm tall Alchori, Shigar Valley, Skardu District, GilgitĀ Baltistan, Pakistan John Rakovan collection |  | | Report (edition) | | Western Australia FRONTISPIECE Euhedral black dravite tourmaline crystals from Yinnetharra. Set in a................................... 32 Marble Bar region ........................................................................................ 36 Cue region ..................................................................................... 36 Yalgoo region .................................................................................... 40 Menzies region .............................................. |  | | Journal (issue) | | Chondrodite from Tanzania| Purple garnets from East Africa|Green prase opal from Tanzania|Trapiche ruby...Mozambique|Tourmaline slices from Myanmar|Wurtzite from Tanzania|Star zircon| Amber processing in Lithuania|Shungite|Gem-set... Gem Notes Chondrodite reportedly from Tanga, Tanzania Chondrodite, (Mg,Fe2+)5(SiO4)2(F,OH)2, is an uncommon...from various localities, including two places in Tanzania: Sumbawanga in the west-central part of the country...(Fritz et al., 2007) and Mahenge in south-central Tanzania (Overton, 2011). A broad range of colour has been |  | | Report (edition) | | FRONTISPIECE Tiger iron from the Ord Ranges, Pilbara region, displaying folded bands of dark brown hematite...eye jasper from the Mount Brockman area, Pilbara region. The sphere, approximately 35 cm in diameter, contains.......................................... 34 Cue region...................................................................................... 34 Yalgoo region .................................................................................... 39 Menzies region .............................................. |  | | Book (edition) | | Kiwi Topaz Malachite Green Gems (continued) Merelani Mint Garnet Moldavite Russian Diopside Trapiche...ee āā.\ Alluvial gold miners in Russiaās Ural Mountains in the early 20" century. It was from deposits...NIGERIA eā TAHITI Tahitian Pearl BRAZIL Agate TANZANIA Amethyst AAA Tanzanian Ruby AAA Tanzanite Alexandrite...Grossular Mali Garnet (Andradite and Grossular) Merelani Mint yarnet Hessonite Tsavorite Uvarovite Hauyne...Tourmaline - Ā„ Rubellite Shimoyo Rubellite - Dravite Chrome Tourmaline - - Unakite - - - - |  | | Journal (issue) | | west of Sakoany village in the Mahajanga (Majunga) region on the north-western coast of Madagascar, near...(605 nm) was somewhat shifted towards the blue region and it lacked Figure 1: This 4.22 ct celestine...inclusions in the ruby permitted the features in this region to be fully resolved. Corundum is anhydrous and...Because vesuvianite absorbs strongly in the mid-IR region of the spectrum, even minute inclusions can give...vesuvianite showed total absorption corresponded to the region of the compound band structure in the 2.19 ct ruby |  | | Journal (issue) | | coin the term tanzanite for blue zoisite from Tanzania. Inasmuch as the campaign was successful, it became...means gem-quality zoisite (of any color?)from Tanzania, or to take a stand and say that some things are...in Kimberley, South Africa; the Mwadui mine in Tanzania),and the significant secondary alluvial deposits...ZAIRE (Belgian Congo) ANGOLA GHANA (Gold Coast) TANZANIA (Tanganyika) CENTRAL AFRICAN REPUBLIC (French...(1970) lor Namibia; Websler (1983) lor Ghana, Tanzania, Sierra Leone, Lesotho, and China; Maillard (1980) |  | | Journal (issue) | | inclusions in quartz from China ā¢ Faceted wurtzite from Tanzania ā¢ Composite amber with an unusual structure ā¢...pressures. Thus, diamond can potentially form in any region of the earth where the depth of the crust or the...24 Dharwar 22 23 26 32 55 34 33 36 56 Tanzania Kimberley Pilbara Madagascar KALAHARI Zimbabwe...to east Antarctica N Napier Complex Vestfold Hills Inferred craton boundaries Exposed Archean crust...Gahcho Kue, DO-27; (2) Fort a la Corne; (3) Buffalo Hills; (4) State Line; (5) Prairie Creek; (6) Wawa; (7) |
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Merelani Hills, Lelatema Mountains, Simanjiro District, Manyara Region, Tanzania