 | | 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 | | Ammoniotinsleyite xls Punta de Lobos, 90 km south of Iquique, I Region, Tarapaca / Chile; Pinkish crystals of up to 1...Pass Thallium Prospect, Little Valley, Sheeprock Mts., Vernon, Tooele Co., Utah / USA; The exceptionally...Azurite xls Gunsight Pass, Helvetia, Santa Rita Mts., Pima Co., Arizona / USA; Blue spherical crystal...location"; NS 28,00; HS 38,00 Baghdadite xls Fuka Mine, Bicchu-cho, Takahashi City, Okayama Pref. / Japan;...Silicate. KS 48,00; NS 95,00 Borcarite xls Fuka Mine, Bicchu-cho, Takahashi City, Okayama Pref. / Japan; |  | Huong, Le, Otter, Laura, Förster, Michael, Hauzenberger, Christoph, Krenn, Kurt, Alard, Olivier, Macholdt, Dorothea, Weis, Ulrike, Stoll, Brigitte, Jochum, Klaus (2018) Femtosecond Laser Ablation-ICP-Mass Spectrometry and CHNS Elemental Analyzer Reveal Trace Element Characteristics of Danburite from Mexico, Tanzania, and Vietnam. Minerals, 8 (6) 234 doi:10.3390/min8060234 | Journal (article/letter/editorial) | | Reveal Trace Element Characteristics of Danburite from Mexico, Tanzania, and Vietnam Le Thi-Thu Huong 1, *...Published: 29 May 2018 Abstract: Danburite is a calcium borosilicate that forms within the...plasma (ICP)-mass spectrometry for danburite from Mexico, Tanzania, and Vietnam. The Tanzanian and Vietnamese...Our results imply that the trace elements of danburite reflect different involvement of metacarbonates...pegmatites among the different locations. Keywords: danburite; trace elements; REE; femtosecond LA-ICP-MS; CHNS |  | | Journal (issue) | | gemstone mining or trading. We are very grateful to the mine owners and traders who opened their doors and let...An overview of the Mulungu mine (Rio Grande del Norte), the only active mine producing Paraiba tourmalines...such as the Mulungu-mine (also known as the Capoeira, Boqueirãozinho, or CDM mine) close to the city of...of Parelhas, which is the only mine currently producing Paraiba tourmaline in some quantities. FACETTE...area. Here, Dr. Hao Wang inspects comb-textured dravite (black tourmalines) arranged along the contact |  | | Catalog/List | | it collected when the Tsumeb Mine (as well as other mines of the region) were still in production in...engineering work took him to the Tsumeb Mine in Namibia. This mine is renowned for producing what are arguably...MINERALS 57001 Azurite Level 8, Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia If the attachment point on...Spitzkopje, Spitzkopje Area, Karibib District, Erongo Region, Namibia Klein Spitzkopje in Afrikaans means: the...Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia Some of the best things to come from the Tsumeb Mine were |  | | Journal (issue) | | Ethiopia|Tourmaline from Mwajanga and Simanjiro District, Tanzania|Alluvial diamond mining in South Africa| Quartz...and CO2-H2O-bearing Fluid Inclusions in Yellow Danburite from Luc Yen, Vietnam By Le Thi-Thu Huong, Kurt...gemological study of blue sapphires from the Baw Mar mine (Mogok, Myanmar)’ was posted by the Gemological...apphires-baw-mar-minemogok-myanmar. The Baw Mar mine has recently produced a significant amount of fine...blue colour of stones from the northern part of the mine is medium to dark, while material from the southern |  | | Journal (issue) | | cabochons| Ceruleite from Chile|Yellow danburite from Namalulu, Tanzania|Emerald from Ethiopia|Vivid purplish...Mountains of southwest Utah, USA. The Ruby Violet mine was the only commercial source of gem-quality red...El Guanaco in the Taltal area of the Antofagasta Region, Chile. He kindly donated a 1.45 ct stone to Gem-A...Yellow Danburite from Namalulu, Tanzania: Gemmological Properties and Chemical Composition Danburite is a...gem-quality yellow danburite entered the market, mined from granitic pegmatites in the Morogoro region of central |  | | Report (issue) | | elbaite crystals with lepidolite from the Golconda Mine in Minas Gerais, Brazil by Eberhard Equit, 1993...Alexander U. Falster and William B. Simmons • Dravite from Qarusulik, Ameralik Fjord in Southwestern...circa 1910 view of the old mine portal on the north side of the Himalaya Mine in San Diego County, CA....Tschermak later focused on tourmaline and named dravite, the third of the currently accepted tourmaline...accepted tourmaline species: schorl, elbaite and dravite. Quensel and Gabrielson (1939) revised Riggs' (1888) |  | | Book | | clarify information regarding minerals from this region. The list, in alphabetical order, generally uses...Actinolite Actinolite Vyuntspakhk Crimea Sarbaiskii mine Sarbay deposit, Rudnyi Sarbay deposit, Rudnyi Sarbay...quarry Stephanitovaya vein, Sarbay quarry Sarbaiskii mine Stephanitovaya vein, Sarbay quarry Sarbay deposit...Khani River Komatiitovyi stream Kurzhunkul'skii mine Maidantai North Urals Pervomaiskii quarry Pogdornoye...Yubileinaya lode Kukisvumchorr Mt. Khibiny Kirovsky mine, Kukisvumchorr Mt. Kukisvumchorr Mt. Putelichorr |  | | Journal (issue) | | and absorption spectra are also known from Umba, Tanzania. The roughness of the crystal plate on both faces...1, Geology Geologyofofthe theYellow Yellow Mine Mine (Taita-Taveta (Taita-TavetaDistrict, District...commongemstone gemstonein in Kenyaand andTanzania Tanzania butbutlittle information is available on the geology...isdescribed. described.MgMgtourmaline tourmaline(dravite-uvite (dravite-uviteseries) series)of ofyellow yellowand...southern Kenya and Tanzania are also tourmaline deposits from southern Kenya and Tanzania are alsobriefly |  | | Journal (issue) | | Gem-Quality Synthetic Emeralds A New Source of Danburite from Vietnam A Chart of Emerald Inclusions Winter...their development. pg. 371 393 A New Find of Danburite in the Luc Yen Mining Area, Vietnam Le Thi-Thu...recently discovered eluvial deposit of honey yellow danburite with excellent transparency. CHARTS pg. 394 ...on titanite 428 Gem News International Blue dravite-uvite tourmaline from Koksha Valley, Afghanistan...fascinating detective story, too. Until recently, danburite was an underappreciated gem, but new sources are |  | | Journal (article/letter/editorial) | | mines, it certainly does not suit the Alto Chapare region, a hot, steamy rain forest on the lower eastern...Department, Bolivia, and specializes in minerals of that region. He is a consulting editor of Rocks & Minerals...Alfredo Petrov with local collectors digging for danburite. Jaroslav Hyrsl photo. Figure 4 (top). Locotal...economically successful product of the Alto Chapare region. Jaroslav Hyrsl photo. Volume 83, March/April 2008...crystals, abundant “textbook” doubly terminated danburite crystals, and interesting specimens of dolomite |  | Bailey, David G., Lupulescu, Marian V., Darling, Robert S., Singer, Jared W., Chamberlain, Steven C. (2019) A Review of Boron-Bearing Minerals (Excluding Tourmaline) in the Adirondack Region of New York State. Minerals, 9 (10) 644 doi:10.3390/min9100644 | Journal (article/letter/editorial) | | Minerals (Excluding Tourmaline) in the Adirondack Region of New York State David G. Bailey 1, *, Marian...metamorphic terranes like that of the Adirondack region of northern New York State, uncommon rock compositions...Mountains; Grenville Province; boron minerals; danburite; datolite; dumortierite; grandidierite; harkerite;...history. Spectacular, well-formed crystals of danburite and tourmaline from northern New York have been...have been identified throughout the Adirondack region of upstate New York. These minerals range from |  | | Journal (article/letter/editorial) | | Chamberlain of specimens in his collection Classic Danburite O CCURRENCE Downloaded by [University of Nebraska...New York 13323 dbailey@hamilton.edu Figure 1. Danburite crystals from the original occurrence, probably...Russell danburite locality. Note the access road south from Dana Hill Road. T HE DANBURITE OCCURRENCE...United States. After the original discovery of danburite in Danbury, Connecticut, the Russell locality...(Brush and Dana 1880). In the interven- Figure 4. Danburite crystals from the original occurrence, collected |  | | Journal (issue) | | mineral type localities. Ilmenite from the Ilmeny Mts, jozeite from San Jose, and other exhibits (up to...arranged according to geographical location (country — region — locality), excluding the tematic collections...ones, the Ilmeny Mts., Slyudyanka, Beryozovsk, Adun-Chilon, and the Zmeinogorskii mine appear to be represented...are from classical localities, such as the II'meny Mts., Beryozovskoye, Vesuvius, Erzgebirge, and others)...mines), malachite (the Gumeshevskii mine), crocoite (the Beryozovskii mine), jasper (Orsk), and others. Large |  | | Journal (issue) | | Newsletter $6.00 Fibrous Malachite from the Mindingi Mine Katanga, Democratic Republic of the Congo Tony Nikischer...Specimens of fibrous malachite from the Mindingi Mine in the Kambove District of Katanga began to appear...ten {I 0) years ago (see figure J ). Although the mine was first worked superficially in the 1930s for...DRC as well (see figure 2). Today, the Mindingi Mine continues to produce wonderful malachite specimens...common forms seen from most nearby localities in the region. Solid, botryoidal malachite samples are currently |  | | Journal (issue) | | responsible for optical effects are described. As yet the region has not yielded a corundum crystal large enough...plant matter or dead animals can penetrate this region (Gubelin, 1987) unless forced by some external...intruded sand grain which somehow had penetrated the region between the shell and the shellbuilding ectoderm...Ch'unch'on). Annual production of the nephrite mine (the Daeil Mine) is reported to be approximately 80 000-90...map of nephrite mine area, Chuncheon, Korea. Occurrences The geology of the nephrite mine area consists |  | Sutherland, Andrew, Sutherland, Scott, Robinson, George W., Lupulescu, Marian, Bailey, David G., Chamberlain, Steven C. (2017) New Danburite Locality Discovered in the Town of Macomb, St. Lawrence County, New York. Rocks & Minerals, 92 (2) 180-187 doi:10.1080/00357529.2016.1277924 | Journal (article/letter/editorial) | | NEW Danburite LOCALITY Discovered in the Town of Macomb St. Lawrence County New York ANDREW SUTHERLAND...Map showing the relative locations of the new danburite locality in the Town of Macomb and the classic...County, New York. s an article on the classic danburite locality near Russell, New York, was going to...(Chamberlain, Lupulescu, Bailey 2015), another danburite occurrence was discovered farther to the west...article is to report this second occurrence of danburite in St. Lawrence County, New York. Figure 2. |  | | Journal (issue) | | apatite, barite, beryl (morganite), wollastonite, danburite, datolite, quartz, calcite, corundum, microcline...calcite; crystal aggregates 15 cm in size. Vеrklinii Mine, Dabugorsk, Pпmorskii Krai, Russia. Specimen: V...(samples of these crystals from kimberlites of this region were kindly submitted to the author by Yana Bao...reveal the rubies. Our field crew worked in this region in 1986 and suggested that the geologists use an...as visible aggregates which are of interest fora region-mineralogical collection (crystals, dtuses of crystals |  | | Journal (article/letter/editorial) | | chalcocite-bearing vein material from the Baltic mine exposing the sulfides. Several samples carried small...these phases. Additional samples from the Baltic mine dump revealed crude wires of native silver associated...calcite from a small sample from the Wolverine No. 2 mine exposed silvery inclusions confirmed as arsenopyrite...Figure 1 (left). Anilite, 1.2 mm, from the Baltic mine, Houghton county, Michigan. Dan Behnke specimen... Arsenopyrite, 1.2 mm, from the Wolverine no. 2 mine, Houghton county, Michigan. Tom Buchholz specimen |  | | Book (edition) | | Linopolis, Brazil, H Page 13: Gold, 35 mm.Eagle's est Mine, California, G Publi!>hed by Grdllit.u.o. Stefanikova43...abbreviated, e.g. canton (Switzerland), vilayet (Turkey), region (Chile), kray and oblast (Russia). The country...abbreviations used are as follows: Mt. (mount or mountain), Mts. (mountains), R. (river), Is. (island), Vole. (volcano)...by Mobutu, and is now the Katanga administrative region again. The former Kivu province is now divided...United States or of the Upper Silesian historical region in Poland, where the importance of ore-bearing |  | Hemingway, Bruch S., Evans, H.T. (1996) Thermal expansion of some borate and borosilicate minerals (fluoborite, danburite, sinhalite, datolite, elbaite, dravite, kornerupine, dumortierite, ferro-axinite, and manganaxinite) between 25 and about 1200 degrees C. Open-File Report Vol. 1996 (96-100) US Geological Survey doi:10.3133/ofr96100 | Report (issue) | | borosilicate minerals (fluoborite, danburite, sinhalite, datolite, elbaite, dravite, kornerupine, dumortierite...0997(4), V = 209.75(3) A3 , and space group P63/m. Danburite (ideal formula, CaB2Si2O8 ) was separated from...heavy liquids and hand picking. The unit cell of danburite was refined at 25°C from data collected at both...and space group R3ttl. A large single crystal of dravite (ideal formula, NaMg3Al6 (BO3 ) 3Si6O18 (OH) 4...inclusions of other phases were present in the dravite of all size fractions. Several inclusion-free fragments |  | | Journal (article/letter/editorial) | | CR ABSTRACT Tourmaline, mica, hambergite, danburite, and axinite from three pegmatite dikes (named...US Swamp, and Spessartine) at the Little Three mine near Ramona, California, have been analyzed by secondary...includes foitite, spessartine, muscovite, axinite, danburite, and rare beryl. The thicker Main dike culminates...miarolitic cavities that contain axinite and danburite, whose B is in 4-fold structural coordination...Main, Swamp, and Spessartine) of the Little Three mine with the principal aims of 1) using the boron isotopic |  | | Report (volume) | | Magnesiodumortierite Alkali-free dravite Complex tourmalines Dravite Uvite Elbaite Highly aluminous tourmalines...feldspars 374 Tourmaline stability in magmas: Dravite 376 Tourmaline stability in magmas: Quartz-tourmaline...assemblages 376 Tourmaline stability in magmas: Schorl-dravite 377 Acknowledgments 379 References 379 Chapter...structure and chemical composition Occurrence Danburite Crystallography and chemical composition Occurrence...such as tourmaline, kornerupine, sinhalite, and danburite as gemstones. Boric acid is used as a mild antiseptic |  | | Journal (article/letter/editorial) | | been investigated in phenacite, kornerupine, danburite, axinite, spodumene, tourmaline, hambergite, and...University mineral collection. Three of the samples (dravite, schorl, elbaite) have been analyzed by several...hambergite hambergite kornerupine kornerupine danburite danburite axinite axinite spodumene spodumene schorl...Hrarigahy, Madagascar Gem crystals from La Bafa Mine, Charcas; San Luis Potosi, Mexico. Luning, Nevada...Mozambique a schorl DC HS-112566 n.1 dravite HS-108796 n.2 c a dravite DC HS-108796 n.1 elbaite DC HS-98144 |
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