 | | Book | | noted gemologist and geologist, Dr. Peter Keller. Kenya and Tanzania are revealed in their full mineralogical...200 known here-holds the productive Mwadui diamond mine, known for Yeryfine, rare, pink diamonds. Emerald...of the 'Irelawney Collection of the Los Angeles County Museum of Natural History. ♦ Figures vii Foreword...Important Gems 23 Chapter 3. Ruby and Sapphire Deposits of East Africa 27 Ruby From Longido, Northern Province...Tanzania 28 Ruby and Sapphire from Umba, Tanga Province, Tanzania 32 Sapphire from Kenya 42 Ruby from Mangari |  | | 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) | | 83–104 Exotic origin of the ruby deposits of the Mangari area in SE Kenya A. Mercier a a,) , P. Debat...gem-corundum Ži.e., ruby and sapphire.. The ruby deposits in the Mangari area of SE Kenya, are among the most...are associated with rootless ultrabasic bodies. Ruby occurs Ž1. in lenses on the inner side of the contacts...studies and petrographic comparisons indicate that the ruby-bearing rocks crystallized under granulite facies...pressures which did not exceed 7 kbar. At Mangari, the ruby-bearing rocks, as their associated ultrabasites |  | | Journal (article/letter/editorial) | | pallasite meteorites, gem benitoite from San Benito County California, and Colombian emeralds (for whose genesis...among geologists and mineralogists. ‘Sapphire’ and ‘ruby’, for example, are not mineral names at all; they...that has been successfully used in prospecting in Kenya, Brazil, and no doubt elsewhere. Association with...muscovite, across a stream from a gem tourmaline mine, Minas Gerais, Brazil. Photo: J. Saul. (Figure...Feneyrol et al. 2010) from the Scorpion Mine (Mgama Ridge, southeast Kenya) could be mined with a teaspoon (Bridges |  | 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) | | minerals Review Ruby Deposits: A Review and Geological Classification Gaston Giuliani 1, *, Lee A. Groat...is not uncommon on Earth but the gem varieties of ruby and sapphire are relatively rare. Gem corundum deposits...classification scheme for ruby deposits is described in the present paper. Ruby forms in mafic or felsic...geological environments are favorable for the presence of ruby: (1) amphibolite to medium pressure granulite facies...volcanism in continental rifting environments. Primary ruby deposits formed from the Archean (2.71 Ga) in Greenland |  | Sorokina, Elena S., Hofmeister, Wolfgang, Häger, Tobias, Mertz-Kraus, Regina, Buhre, Stephan, Saul, John M. (2016) Morphological and chemical evolution of corundum (ruby and sapphire): Crystal ontogeny reconstructed by EMPA, LA-ICP-MS, and Cr3+Raman mapping. American Mineralogist, 101 (12) 2716-2722 doi:10.2138/am-2016-5614 | Journal (article/letter/editorial) | | Morphological and chemical evolution of corundum (ruby and sapphire): Crystal ontogeny reconstructed by...evolution of corundum crystals from deposits in Africa (Kenya, Tanzania, Madagascar) and Southeast Asia (Vietnam)...corundum from two deposits in the Mangari area in Kenya have Cr concentrations of ~200–700 mg/g in crystals...high P-T conditions. Prismatic habit of bright red ruby crystals was linked to Cr concentrations of ≥1500...in samples from Luc Yen (Vietnam) and Mangari (Kenya), formed under lower P-T. Concentrations of Cr between |  | | Journal (issue) | | identifying the deposit or country of origin of the ruby. The lead article in this issue reports the results...rubies from several different deposits. The natural ruby crystal shown here on a calcite marble matrix is...17 x 10 x 9 mm. The accompanying 1.29 ct faceted ruby is from Mogok, Myanmar. Both are courtesy of the...the stones for a single research project. For the ruby study, some samples were donated, many were loaned...help identify the geologic environment in which a ruby formed, and thus imply a geographic origin. ABOUT |  | | Book | | Mineralogy and Geochemistry of Ruby Edited by Frederick Lin Sutherland and Khin Zaw Printed Edition... Mineralogy and Geochemistry of Ruby Mineralogy and Geochemistry of Ruby Editors Frederick Lin Sutherland...the Special Issue “Mineralogy and Geochemistry of Ruby” published online in the open access journal Minerals... vii Preface to ”Mineralogy and Geochemistry of Ruby” . . . . . . . . . . . . . . . . . . . . . . . ...for Special Issue “Mineralogy and Geochemistry of Ruby” Reprinted from: Minerals 2020, 10, 888, doi:10 |  | | Book | | ' (Job 28:18) 'They brought me rubies from the mine, And held them to the sun, I said, "They're drops...bipyramid, tabular hexagonal prism Varieties: Red= ruby Blue = sapphire All other colours are termed sapphire...o-ray usually more intensely coloured than e-ray Ruby: o-ray = purplish red; e-ray = orangy red Blue sapphire:...blue; e-ray = greenish blue Absorption spectrum: Ruby (Cr) = fluorescent doublet at 694.2 and 692.8, narrow...and 470 nm (weakest) Ultraviolet fluorescence: Ruby = inert to strong red (long wave and short wave) |  | | Book | | anything other than yawns is always a scarce item. But Ruby & Sapphire is just such a book-a rare combination...face and fun, the pertinent and che peculiar. Open Ruby & Sapphire and you seep into a secret world where...few of the amazing and colorful tales within. Bur Ruby & Sapphire is also 1nuch more. T he product of over...is here, a virtual encyclopedia of the subject. Ruby & Sapphire highlights: • Side-by-side photos illustrate...book on precious stones or minerals, it should be Ruby & Sapphire, which is nothing less than a tour-de-force |  | | Journal (issue) | | without notice. On The Cover A massive plate of ruby-in-zoisite, measuring almost 11 inches across, courtesy...ounce lots $600.00. Darlene and I with our guides, mine foreman and guards at the Welo opal mines in Ethiopia...elsewhere (in the Paisano volcano, several miles to the west of The Carver Agate Field) and that subsequent to...without notice. C MARCH 2020 3 ROYAL PEACOCK OPAL MINE Dig your own Virgin Valley Fire Opals ALL YOU FIND...deep red crystals of ruby, which contrasted with the green host rock. The ruby crystals varied in size |  | | Journal (issue) | | Hidden Valley Jasper and Moonshine Jasper. We own and mine these claims. You can contact any of us for specimens...Owner/proprietor Steve Schultz Mine Owners Tom & Jessa Pearson Mine Owners * Specializes in Mines Agates...gml@gmail.com | shop.gilmansatthecave.com ROUGH GEMS MINE-DIRECT FACETING ROUGHS & MINERAL Sapphire, Emerald...Mineral Lists Call or Write: Mary Groves 34 Groves Lane, PO Box 26 Poland, Maine 04274 (207) 998-2350 E-mail...material can be found. Our destination was Seminole County, Oklahoma. The agate and conglomerates are named |  | | Book (volume) | | families or groups of villagers purchase a licence to mine; in other areas there is little regulation, and...buyer (such as a ruby or sapphire buyer) will, by building relationships with miners, mine owners, and local...localities of some of the best known gemstones (diamond, ruby, sapphire, emerald, aquamarine, chrysoberyl, topaz...Aquamarine Emerald Jadeite jade Nephrite jade Peridot Ruby Sapphire Topaz Tourmaline Turquoise Canada Diamond...Diamond Emerald Peridot Ruby Tourmaline East Africa Aquamarine Diamond Emerald Ruby Sapphire Tanzanite Tourmaline |  | | Book | | it into Doubletree by Hilton, Granta Place, Mill Lane (& 01223/ 259988). Its location on the Cam River...See p. 252. Salisbury This cathedral city in the West Country still doesn’t equal Bath in first-class...360. The Gastrobistro at the Pheasant Inn, 19 Salt Lane (& 01722/41426), has become Salisbury’s finest restaurant...than the Cotswolds, less than 161km (100 miles) west of London, its rolling hills and pasturelands peppered...daffodils.” See “Grasmere,” in chapter 18. • Haworth (West Yorkshire): Second only to Stratford-upon-Avon as |
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