 | | Book | | noted gemologist and geologist, Dr. Peter Keller. Kenya and Tanzania are revealed in their full mineralogical...of the 'Irelawney Collection of the Los Angeles County Museum of Natural History. ♦ Figures vii Foreword...Tanzania 32 Sapphire from Kenya 42 Ruby from Mangari, Tsavo West National Park, Kenya 44 Chapter 4. Emerald...Red Dravite Tourmaline from the Narok District, Kenya 99 Uvite-Dravite Chrome Tourmaline 99 Chapter 8...Enstatite 121 Euclase 122 Idocrase Iolite 123 Kornerupine 123 Moonstone Feldspar 123 Peridot 124 Phenacite |  | | Book | | MINERALS& GEMSTONES of East Africa Burundi, Kenya, Rwanda, Tanzania and Uganda Bruce Cairncross Published...Africa 10 East African resources 12 Burundi 13 Kenya 14 Rwanda 16 Tanzania 17 Uganda 20 Gemological properties...through Tanzania, Kenya, Ethiopia and into the Sudan - has blessed East Africa, Kenya and Tanzania, with...now mainland Tanzania) and then progressing to Kenya - I am proud to say that the coloured gemstones...fact is that both of the national gemstones of Kenya and Tanzania (tsavorite and tanzanite, respectively) |  | | Journal (article/letter/editorial) | | humite, hypersthene, jeremejevite, johachidolite, kornerupine, kyanite, londonite, magnesioaxinite, manganotantalite...pallasite meteorites, gem benitoite from San Benito County California, and Colombian emeralds (for whose genesis...that has been successfully used in prospecting in Kenya, Brazil, and no doubt elsewhere. Association with...from the Scorpion Mine (Mgama Ridge, southeast Kenya) could be mined with a teaspoon (Bridges 2007; Campbell...John Saul Ruby Mine in Tsavo West National Park, Kenya, came from what was with reason called ‘the crumbly |  | Giuliani, Gaston, Fallick, Anthony E., Boyce, Adrian J., Pardieu, Vincent, Pham, Van Long (2017) Pink and Red Spinels In Marble: Trace Elements, Oxygen Isotopes, and Sources. The Canadian Mineralogist, 55 (4) 743-761 doi:10.3749/canmin.1700009 | Journal (article/letter/editorial) | | Nepal, Kiswila and Ipanko in Tanzania, Pamreso in Kenya, Mogok in Myanmar, and An Phu in Vietnam. The variation...Occurrences are known in Pakistan, Afghanistan, Nepal, Kenya, and Mozambique (Vertriest & Pardieu 2016). Secondary...Neoproterozoic metamorphic Mozambique Belt. In Kenya, the Pamreso spinel occurrence, in the Voi region...from 6000 to 11,000 ppm while that of Pamreso in Kenya is between 4400 and 6300 ppm. The Mogok and Namya...WORLDWIDE DEPOSITS Country Deposit Sample Color Kenya Pamreso Myanmar Mansin Mogok Mogok Namya Nepal |  | | Journal (article/letter/editorial) | | Proterozoic rocks in the Caledonides, Nordland County, Norway (Grauch et al. 1994; Burt 1994). The mineral...05 16.55 wt.% (minimum and maximum from Mangari area, Kenya and Vizianagaram, India, by Mercier et al...peralkaline syenite autolith, from Kilombe volcano, Kenya, with 5.98 7.93 wt.% MnO, which corresponds to 1...in aenigmatite from nepheline syenite on Mount Kenya. Aenigmatite found in an albite clast in the Kaidun...contrast to the magnesian aenigmatite from Mount Kenya, in which divalent cations total 8.5 9.0 per 28 |  | Keulen, Nynke, Thomsen, Tonny B., Schumacher, John C., Poulsen, Majken D., Kalvig, Per, Vennemann, Torsten, Salimi, Rita (2020) Formation, origin and geographic typing of corundum (ruby and pink sapphire) from the Fiskenæsset complex, Greenland. Lithos, 366. 105536pp. doi:10.1016/j.lithos.2020.105536 | Journal (article/letter/editorial) | | sapphirine, calcic amphibole, sillimanite and kornerupine. Resulting reaction zones are typically between...some (OH)-bearing silicates; presence of both kornerupine and tourmaline in some of the reaction zones...zircon have been described for pr rubies from Mangari, Kenya (Smith 2014). Zircon is a less common inclusion...negative crystals are commonly observed in e.g., Mangari, Kenya (Smith, 2014), in Mogok, in various magmatic... Zonal clouds are reported for rubies from Mangari, Kenya, while milky zones more commonly occur in, |  | 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) | | Vohitany; Ejeda). Ethiopia: (5) Kibre mengist, Dilla. Kenya: (6) West Pokot; (7) Baringo; (8) Kitui; Gogogogo;...Vohitany; Ejeda). Ethiopia: (5) Kibre mengist, Dilla. Kenya: (6) West Pokot; (7) Baringo; (8) (9) Kitui; Mangare...and theand Rockland (former John Saul) mine in Kenya stopped producing. Africa (Figure 4) gem rubies...John Saul) mine in Kenya stop ucing. In Africa (Figure 4) gem rubies are mined in Kenya (Mangare and Baringo)...Baringo and Antanifotsy (Soamiakatra) deposits in Kenya deposits in Kenyarespectively. and Madagascar, respectively |  | | Journal (article/letter/editorial) | | system should result in hydrous phases, such as kornerupine, staurolite, and gedrite, which are stable at...“Exotic Origin of the Ruby Deposits of the Mangari Area in SE Kenya,” Ore Geol. Rev. 14, 83–104 (1999). 44...Xenoliths from the Chyulu Hills Volcanic Field, Kenya: GabbroTroctolitic Cumulates Subjected to Lithospheric...(2006). 67. S. Wegge and W. Schreyer, “BoronFree Kornerupine: Its Upper Pressure Stability Limit in the System |  | | Journal (article/letter/editorial) | | Klockmannite Knopite Koesterite Kolbeckite Kolymite Kornerupine Kotoite Krennerite Kristiansenite Kutnahorite...occur in the Michigan Copper District in Keweenaw County, USA. It is not a true volcanic-hosted mineralization...pipe deposit of the Bagdad Mine in the Yavapai County, Arizona, USA, is hosted in rhyolites. The fragments...in calcite at Barrick Gold Mine, Mercur Tooele County Utah, USA. molecular mixture of thallium malonate...of Fe-sulfides from the Manchester coal bed, Clay County in Kentucky, USA (Hower et al., 2008). High-sulfur | | | Journal (article/letter/editorial) | | Klockmannite Knopite Koesterite Kolbeckite Kolymite Kornerupine Kotoite Krennerite Kristiansenite Kutnahorite...occur in the Michigan Copper District in Keweenaw County, USA. It is not a true volcanic-hosted mineralization...pipe deposit of the Bagdad Mine in the Yavapai County, Arizona, USA, is hosted in rhyolites. The fragments...in calcite at Barrick Gold Mine, Mercur Tooele County Utah, USA. molecular mixture of thallium malonate...of Fe-sulfides from the Manchester coal bed, Clay County in Kentucky, USA (Hower et al., 2008). High-sulfur |  | | Book | | exploration at the Rockland Ruby Mine, Mangare area, S.E. Kenya. J. Geochem. Expl. 1997, 59, 87–89. [CrossRef] Yakymchuk...Vohitany; Ejeda). Ethiopia: (5) Kibre mengist, Dilla. Kenya: (6) West Pokot; (7) Baringo; (8) Kitui; (9) Mangare...Saul) mine in Kenya stopped producing. In Africa (Figure 4) gem rubies are mined in Kenya (Mangare and...Baringo and Antanifotsy (Soamiakatra) deposits in Kenya and Madagascar, respectively. (A) Desilicated pegmatite...for metasomatites as plumasites (John Saul mine, Kenya). Figure 19. Fe (ppm) versus Ga/Mg discrimination |  | | Journal (issue) | | Tanzania|Trapiche ruby from Myanmar|Sapphires from Kenya|Shattuckite and bisbeeite from the DRC| Purple tourmaline...Modified after Sunagawa (2003). Sapphires from Kina, Kenya During the February 2014 Tucson gem and mineral...sapphires that reportedly came from Kina in central Kenya, about an hour’s drive from Garba Tula. The parcel...(1.03–1.94 ct) from a relatively new deposit in Kenya were examined for this report: blue, green, yellow...The Dusi (Garba Tula) sapphire deposit, central Kenya—A unique Pan-African corundum-bearing monzonite |  | | Book | | Bibliography-Japan 374 • RUBY & SAPPHIRE 17 329 296 Kenya Thailand/Camborua 374 Two geologists' dream:...Characteristics of Mangari ruby 376 O ther Kenya ruby localities 378 Sapphire in Kenya 378 Bibliography-Kenya 378 ...Afghanistan Burma India (locality 1) India (locality 2) Kenya Sri Lanka Thailand Synthetic ruby Chatham lnamori...(these often disappear after hear treatment). C Kenya. Tabular to blocky hexagonal prisms, often ,vith...pink) • Burma, Sri Lanka, Vietnam, Afghanistan, Kenya, Tanzania • Thailand/Cambodia Blue sapphire • Sri |  | | Journal (issue) | | Kedia, India Masaru Mizumura, Japan Alice Muthama, Kenya Stephan Reif, Austria Philippe Scordia, France Kobi...2017). Occurrences are known in Pakistan, Nepal, Kenya and Mozambique (Vertriest and Pardieu, 2016). Secondary...Neoproterozoic metamorphic Mozambique Belt. In Kenya, the Pamreso spinel occurrence (in the Voi region)...found in the primary spinel deposit of Pamreso in Kenya. Madagascar. The Ilakaka deposits produce very fine...from 6,000 to 11,000 ppm while that of Pamreso in Kenya is between 4,400 and 6,300 ppm. The Mogok and Namya |  | | Book (edition) | | tanzanite (zoisite), iolite, andalusite, danburite, kornerupine and enstatite are some of the minerals which...recorded, from Kentucky, and another from Rutherford county, North Carolina, a pale yellow flattened octahedron...was established in the area of Murfreesboro, Pike county, Arkansas, where three types of igneous rock are...and, most unusually, in situ, near Wutu, Changle county, central 142 Australia Shandong Province. The...sapphire-bearing rock of Yogo Gulch, Judith Basin county. The first report of the occurrence was published |  | | Book | | Thailand, Cambodia, Sri Lanka, India, Australia, Kenya, Tanzania, Montana and North Carolina (USA), Nigeria...Australia 94 Sapphire - Montana, USA 96 Ruby - Kenya 97 Sapphire - Umba Valley, Tanzania 98 Bibliography...Australia 295 Bibliography 295 East Africa (Kenya and Tanzania) 295 Kenya 296 Tanzania 298 Bibliography 300 Montana...004 0.030 0.010-0.020 0.020-0.070 0 <0.004 Mangari, Kenya 1.100-1.800 0.940 0.000-0.003 0.230 0.060-0...Generally the same as for Sri Lankan sapphires. Kenya Tabular to blocky hexagonal prisms, often with adhering |  | | Book | | gem corundum deposit are: John Saul Ruby Mine (Kenya) type (R2) is for ruby; for sapphire, syenitic rocks...The Dusi (Garba Tula) sapphire deposit, Central Kenya–a unique Pan-African corundum-bearing monzonite...Mogok (Myanmar), desilicated pegmatite from Mangari (Kenya), amphibolitic-type from Chimwadzulu (Malawi)...Morogoro, corundum-bearing anatexites [122]; Mangari, Southern Kenya, Metasomatic rubies [123–125]; Hunza, rubies...The Dusi (Garba Tula) sapphire deposit, Central Kenya—A unique Pan-African corundum-bearing monzonite |  | | Journal (issue) | | syenite as in Montana (United States) and Garba Tula (Kenya), respectively. Metamorphic deposits are divided...from the John Saul mine in the Mangare area of Kenya (612 ± 6 Ma; Simonet, 2000), Longido in Tanzania...(750–540 Ma) that extends from Somalia through Kenya, Tanzania, Malawi, Mozambique, and Madagascar. This...index minerals are sapphirine, garnet, spinel, kornerupine, phlogopite, and zoisite. The assemblage formed...0 Contact zone Cr2O3 (wt.%) Am Crd Mangare (Kenya) Crd Gt Contact zone Gt Montepuez (Mozambique) |
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