 | KĆ¼ster, Dirk, Romer, Rolf L., Tolessa, Dandena, Zerihun, Desta, Bheemalingeswara, K., Melcher, Frank, OberthĆ¼r, Thomas (2009) The Kenticha rare-element pegmatite, Ethiopia: internal differentiation, UāPb age and Ta mineralization. Mineralium Deposita, 44 (7) 723-750 doi:10.1007/s00126-009-0240-8 | Journal (article/letter/editorial) | | 1007/s00126-009-0240-8 ARTICLE The Kenticha rare-element pegmatite, Ethiopia: internal differentiation, UāPb...Springer-Verlag 2009 Abstract The Kenticha rare-element pegmatite, a globally important tantalite source...source in the Neoproterozoic Adola Belt of southern Ethiopia, is a highly fractionated, huge (2,000 m long...rareelement pegmatite class and belongs to the lithiumācesiumā tantalum petrogenetic family. The Kenticha pegmatite...an internal geochemical differentiation of the pegmatite sheet proceeding from the lower zone (K/Rb ~36 |  | | Journal (issue) | | Age Dating of Zircon Inclusions in Sapphire Ethiopia Field Report 2019 Tucson Report Spring 2019 VOLUME...table facets. FIELD REPORTS 72 p. 135 Land of Origins: A Gemological Expedition to Ethiopia Wim Vertriest...opal, and emerald mining and trading areas of Ethiopia. REGULAR FEATURES 29 The Dr. Edward J. GĆ¼belin...in opal ā¢ Trapiche-like ruby from the Batakundi mine in Kashmir ā¢ Sapphire inclusion with rutile āsilkā...Moonstone jewelry ā¢ Oregon sunstone ā¢ Potentate mine sapphire update ā¢ āRainbow latticeā feldspar ā¢ Responsibly |  | | Report (issue) | | ................. K5 Lithium-Cesium-Tantalum Pegmatite Deposits........................................ K14 Exploration for Lithium-Cesium-Tantalum Pegmatite Deposits................................................................................... K15 Mine Waste Characteristics.............................sedimentary basins and extracted from granitic pegmatite ores. The leading producer of lithium from brine...in 1898 at the Etta pegmatite in South Dakota. In the early 1900s, other pegmatite mines in California |  | | Journal (issue) | | danburite from Namalulu, Tanzania|Emerald from Ethiopia|Vivid purplish pink fluorite from Illinois, USA|...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...mined from granitic pegmatites in the Morogoro region of central Tanzania (Chadwick and Laurs, 2008)...several weak bands were recorded in the visible region at approximately 525, 567, 577, 584, 732, 744 and |  | | Journal (issue) | | M. Gressm an tgressman@comcast.n et The Musonoi mine, Kolwezi District, Lualaba Province, Democratic...COVER: METATORBERNITE, 6.6 cm, from the Musonoi mine, Kolwezi District, Democratic Republic of the Congo...April, 201 8 Prese!tt,a to Roderick Tyson For field collecting achievements contributing to the heritage...Rod Tyson has been one of the leading Canadian field collectors for decades, and has brought countless...March-April, 2018 Record, in recognition of his field-collecting achievements contributing to the Heritage |  | | Book | | 40Ar/39Ar Age of the Gem-Bearing BoqueiraĢo Granitic Pegmatite, Parelhas, Rio Grande do Norte, Brazil Reprinted...Gabriele Lanzafame Gem-Quality Tourmaline from LCT Pegmatite in Adamello Massif, Central Southern Alps, Italy:...Enigmatic Alluvial Sapphires from the Orosmayo Region, Jujuy Province, Northwest Argentina: Insights...economically important gem-bearing BoqueirĆ£o granitic pegmatite situated in the Borborema Pegmatitic Province...granitic pegmatite is classiļ¬ed as a member of the Lithium-Caesium-Tantalum (LCT) pegmatite family and |  | | 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 |  | | Report (issue) | | .B3 Graph showing dates associated with all the mine sites on the U.S. Environmental Protection Agencyās...production, U.S. apparent consumption, and U.S. mine production of antimony from 1900 to 2012............................F2 Graph showing world cobalt mine and refinery production and apparent consumption.....................F2 Graph showing world cobalt mine production from 1950 to 2011......................F4. Pie chart showing percentage of world cobalt mine production in 2011, by country................. |
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