 | | Journal (article/letter/editorial) | | Gem Variety of Zoisite Merelani Hills, Simanjiro District Manyara Region, Tanzania T anzanite is one of...geological environment in one small geographic region on one continent: Africa. Added to this uniqueness...restricted occurrence, tanzanite from the Merelani Hills in Tanzania is the mineral featured in this Connoisseur’s...used for various colored zoisite crystals from Tanzania other than blue-purple-violet, and this should...graphite, 10 cm, Merelani Hills, Lelatema Mountains, Simanjiro district, Manyara region, Tanzania. Marcus Budil |  | | Book | | GEMSTONES of East Africa Burundi, Kenya, Rwanda, Tanzania and Uganda Bruce Cairncross Published by Struik...cover: (top) Grossularvariety hessonite on blue calcite, 2.5 cm - Philip Hitge specimen, Bruce Cairncross...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 |  | | Journal (article/letter/editorial) | | ineral N ames Merelaniite Merelani (Mererani) Manyara Region Tanzania JOHN A. JASZCZAK Department...shown are also associated prehnite, chabazite, and calcite. John A. Jaszczak specimen and photo. M erelaniite...village of Merelani “in honor of the local miners, past and present, living and working in the region” (Jaszczak...from the tanzanite mines in Tanzania, eastern Africa. Merelaniite from Tanzania was actually first noted...stilbite, chabazite, tremolite, diopside, quartz, calcite, graphite, alabandite, and wurtzite. Similar but |  | | Journal (article/letter/editorial) | | Zoisite BRUCE CAIRNCROSS Merelani Hills, Simanjiro District Manyara Region, Tanzania Department of Geology...South Africa brucec@uj.ac.za Figure 1. Map of Tanzania, prepared by William Besse. Tanzanite is mined...desirable is undoubtedly the variety tanzanite, from Tanzania (fig. 1). Mindat.org lists more than one thousand...permission Figure 2. Tanzanite crystal associated with calcite and prehnite, 4.4 cm. Ryan Bowling specimen, Jeff...Figure 3. General view of artisanal workings at Merelani Hills. Some small mine headframes are visible in |  | | 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 |  | | Journal (article/letter/editorial) | | Green Gem Variety of Grossular Merelani Hills, Manyara District, Tanzania G rossular, Ca3Al2(SiO4)3,...for this column (fig. 1) are from the Merelani Hills, Tanzania. From the standpoint of this article,...formation. They concluded that the metamorphism in the region occurred from 620 to 580 ma, coincidental with... back center specimen 2.6 cm, Merelani Hills, Manyara region, Tanzania. Patrick Meyer specimens, Jeff...of tsavorite is the Lemshuku mining district, northeast Tanzania (Bridges 1974). However, tsavorite was |  | | Catalog/List | | Ammoniotinsleyite xls Punta de Lobos, 90 km south of Iquique, I Region, Tarapaca / Chile; Pinkish crystals of up to 1...mm, together with some dark brown perovskite in calcite matrix. Excellent specimens of the rare Zirconium...(xls) Arakawa, Minamiboso City, Chiba Pref., Kanto Region, Honshu Island / Japan / TYP; The extremely rare...crystals of 1 cm, very rich in addition to small Calcite crystals on large cavities in Limestone matrix...Mwajanga Pegmatite, Mererani, Simanjiro District, Manyara Region / Tanzania; The rare and new mineral of |  | | Report (issue) | | X-ray Powder Pattern: Merelani Hills, Lelatema Mountains, Manyara Region, Tanzania. 2.965 (100), 5.94 (60)...56 25.77 . 99.99 (1) Merelani Hills, Lelatema Mountains, Manyara Region, Tanzania; average of 13 electron...masses of loosely aggregated graphite crystals. In a region of granulite-facies metamorphism of organic-rich...stilbite, chabazite, tremolite, diopside, quartz, calcite, graphite, alabandite, wurtzite. Distribution:...tanzanite gem mines, Merelani Hills, near Arusha, Lelatema Mountains, Manyara Region, Tanzania. Name: Honors |  | | Catalog/List | | Minerals 5 AT L A S Mibladen, MOR Manyara, TZ Merelani Hills Tsumeb, NA Anjanbonoina, MG This catalog...Madagascar ing in the east African nation of Tanzania, which we find the uncommon form of tourmaline...rarer gem species And north, in the Drâa-Tafilalet Region of Morocco, tsavorite. Traveling west to the storied...locality for the species. Calcite on Dioptase Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia 13 cm tall x...versions of the calcite and dioptase combination. The more common version is dioptase on calcite. This is one |  | | Journal (article/letter/editorial) | | distinguish the characteristics of inclusions (calcite, anatase, graphite etc.) between natural and heat-treated...pleochroism. In natural unheated tanzanite (N5), calcite inclusion is often interspersed with dolomite and...temperature treatment samples, the baseline of calcite increased and their Raman peaks gradually shifted...called tanzanite. Until now, the Merelani area in northeastern Tanzania is the only producer of gem-quality...Antarctica to East Africa, and enters the Arabian–Nubian region, which was formed by a series of tectonic and metamorphic |  | | 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 |  | | Catalog/List | | Pink Fluorite on Muscovite, Chumar Bakhoor, Nagar District, Gilgit-Baltistan, Pakistan 9 cm tall x 7 cm wide...primarily sourced from the ancient mines of the Ural Mountains. Today, the very finest come from China and the...Tanzanite has only been found in one place on earth—Tanzania. It is a rare and coveted gemstone. Tanzanite...Tanzanite, Merelani Hills, Lelatema Mountains, Simanjiro District, Manyara Region, Tanzania 12 cm tall...rarity. Tourmaline in Pollucite, Paprok, Kamdesh District, Nuristan, Afghanistan 16.5 cm tall x 14 cm wide |  | | Journal (article/letter/editorial) | | of orthoclase, the pericline variety of albite, calcite, epidote, muscovite, quartz, titanite, chabazite...” 5.6 cm tall, Alchori, Shigar Valley, Skardu district, GilgitBaltistan, Pakistan. Private collection...syenite pegmatites in the Imilchil area, High Altas Mountains, Morocco (Jahn et al. 2003); the Alpine clefts...Rural City, Victoria Aberfoyle mine, Rossarden district, Tasmania Complex metamorphosed sedimentary exhalative...Paraíba: e.g., Sapo mine, Ferruginha; Golconda district, Governador Valadares; Linópolis, Divino das |  | Jaszczak, John, Rumsey, Michael, Bindi, Luca, Hackney, Stephen, Wise, Michael, Stanley, Chris, Spratt, John (2016) Merelaniite, Mo4Pb4VSbS15, a New Molybdenum-Essential Member of the Cylindrite Group, from the Merelani Tanzanite Deposit, Lelatema Mountains, Manyara Region, Tanzania. Minerals, 6 (4) 115 doi:10.3390/min6040115 | Journal (article/letter/editorial) | | Group, from the Merelani Tanzanite Deposit, Lelatema Mountains, Manyara Region, Tanzania John A. Jaszczak...gem mines near Merelani, Lelatema Mountains, Simanjiro District, Manyara Region, Tanzania. It occurs sporadically...stilbite, chabazite, tremolite, diopside, quartz, calcite, graphite, alabandite, and wurtzite. In reflected...cylindrite group; molybdenum; lead; Merelani tanzanite deposit; Tanzania Minerals 2016, 6, 115; doi:10.3390/min6040115...of 19 1. Introduction Merelaniite, from Merelani, Tanzania, was first identified unknowingly in 2012 |  | | Journal (article/letter/editorial) | | Steve Smale specimen. Figure 10. Carrollite with calcite, 4.5 cm high, Kamoya, Katanga, Democratic Republic...azurite, 4.9 cm high, Tsumeb mine, Tsumeb, Otijikoto region, Namibia; Scott Rudolph specimen. Downloaded...diggings, Bendougou, Arrondissement, Diako, Kayes region, Mali; Demetrius Pohl specimen. Figure 13. Elbaite...Malosa, Zomba district, Malawi; Scott Rudolph specimen. Figure 16. Rosasite with calcite and duftite,... 6.2 cm high, Tsumeb mine, Tsumeb, Otjikoto region, Namibia; Scott Rudolph specimen. Figure 17. Metatorbernite |  | | 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....(5) Andradite, Antetezambato, Madagascar. (6) Calcite, Mashamba West mine, Congo Republic. (7) Sodalite...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 |  | | Journal (article/letter/editorial) | | DC 20013 pohwatp@si.edu Diopside MERELANI, ARUSHA REGION, TANZANIA Most silicates . . . are drab and...with graphite, 6 cm high, from Merelani Hills, Arusha Region, Tanzania. Steve Smale specimen, James Elliott...cut of diopside from the Kunlan Mountains, Xinjiang Autonomous Region, China. The rays of light are an...vesuvianite, tremolite, scapolitegroup minerals, calcite, and quartz. So now that we know a little more...Baicheng, Kunlun Mountains, Akesu Prefecture, 168 ROCKS & MINERALS Xinjiang Autonomous Region. These are |  | Jaszczak, John A., Trinchillo, Daniel (2013) Miracle at Merelani A Remarkable Occurrence of Graphite, Diopside, and Associated Minerals from the Karo Mine, Block D, Merelani Hills, Arusha Region, Tanzania. Rocks & Minerals, 88 (2) 154-165 doi:10.1080/00357529.2013.763671 | Journal (article/letter/editorial) | | Technology] at 07:05 23 August 2013 Miracle AT Merelani A Remarkable Occurrence of Graphite, Diopside...Block D, Merelani Hills Arusha Region, Tanzania T he gem mines of the Merelani Hills, Arusha Region, Tanzania...mining methods at TanzaniteOne Mining Ltd. (Arusha, Tanzania) expand in Block C, and as more primitive mining...Figure 1. The Karo mine area in Block D of the Merelani mining complex, with the TanzaniteOne (Block C)...view), as seen from a road about halfway between Merelani and the access gate. Fabio Americolo photo (August |  | | Journal (article/letter/editorial) | | ASSoCiAtED miNERAlS, KARo pit, BloCK D, mERElANi hillS, tANzANiA. J. M. Long1, J. F. Rakovan2, J. Jaszczak3...Biochemistry, miami university oxford, oh 45056. The Merelani Hills deposit is best known as the exclusive locality...discovered in the Karo pit, Block D, of the Merelani Hills that contained the following mineral assemblage:...localities: The Merelani tanzanite nines, Lelatema Mountains, Arusha Region, Tanzania. Mineralogical Record...40:346–408. An unusually coarsely crystalline calcite from the Yucatán peninsula, Mexico. J. Minges1 |  | | Report (issue) | | Green Fluorite mine, Manaoshan Mountain, Suxian district, Chenzhou Prefecture, Hunan Province. And I will...Green Fluorite mine, Manaoshan Mountain, Suxian district, Chenzhou Prefecture, Hunan, China. The Arkenstone...material hails from somewhere in the Merelani Hills, Manyara, Tanzania, and only two of the nine specimens...variety tsavorite, 3 cm, from the Merelani Hills, Manyara, Tanzania. Marin Mineral Company specimen and...tsavorite) and pyrite, 2.5 cm, from the Merelani Hills, Manyara, Tanzania. Marin Mineral Company specimen and |  | | Journal (article/letter/editorial) | | serpentinites. Commonly associated minerals include calcite, dolomite, quartz, clinozoisite, wollastonite,...Associated minerals include aegirine, allanite, calcite, epidote, prehnite, titanite, and microcline (Horváth...crystals in the collection are associated with calcite. Grossular is also found in a skarn at Bancroft...Associated minerals include meionite, clinozoisite, and calcite. Crystal clusters to slightly under 1 meter across...the specimen probably originated in the Wah Wah Mountains, which are close to Milford. Zoned dodecahedral |  | | 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...4-cm specimen of radiating scalenohedral white calcite was collected many years ago and fluoresces an...collected 15.5-cm specimen of fluorescent manganoan calcite from the N’Chwaning II mine, fluoreces a vivid |  | 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...precipitating calcite and mobilizing the elements for tsavorite crystallization in quartz-calcite veins. The...an anhydritegypsum-dolomite lens (lens I) and a calcite-scapolite-diopside-sulfides-graphite lens (lens |  | | Report (issue) | | 0.05 2.00 Total [99.74] (1) \Umba Valley," Tanzania; CaO originally given as 22.44%, and total given...Garnet, albite, biotite, \hornblende," quartz, calcite. Distribution: Widespread. Classic localities...Quebec, Canada. In the Juarez district, Baja California, Mexico. From Tanzania, exceptional gem material...material in the Merelani Hills, Lelatema Mountains, 40 km southeast of Arusha. Well crystallized from Alchuri...(4) Hurlbut, C.S., Jr. (1969) Gem zoisite from Tanzania. Amer. Mineral., 54, 702{709. (5) Smith, J.V. |  | | 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...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...considered to be unique to the area around Merelani in northeastern Tanzania. The tanzanite deposits, mined along |
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D-Block Mine, Merelani Hills, Lelatema Mountains, Simanjiro District, Manyara Region, Tanzania