 | | Report (issue) | | The Natural History Museum of Milan and its Madagascar Collection The Museo Civico di Storia Naturale... the museum began paleontologic fieldwork in Madagascar (upper Permian fauna and Jurassic and Cretaceous...fieldwork in Madagascar in 1996 in collaboration with other institu tions in Madagascar, Italy, and the...Pezzotta has spent a total of twenty nine months in Madagascar making geological-mineralogical surveys. In collaboration...both classic and new minerals and gemstones from Madagascar opened at the Natural History Museum in Milan |  | Gatta, G. D., Vignola, P., McIntyre, G. J., Diella, V. (2010) On the crystal chemistry of londonite [(Cs,K,Rb)Al4Be5B11O28]: A single-crystal neutron diffraction study at 300 and 20 K. American Mineralogist, 95 (10) 1467-1472 doi:10.2138/am.2010.3554 | Journal (article/letter/editorial) | | 1467–1472, 2010 On the crystal chemistry of londonite [(Cs,K,Rb)Al4Be5B11O28]: A single-crystal neutron...9, France abstract The crystal chemistry of londonite, a rare Cs-bearing mineral [ideal chemical formula:...granitic pegmatites of the Antsongombato Gem Mine, Betafo district, Madagascar, has been reinvestigated...Cs+Rb(CsO2+RbO2 ≥ 8 wt%) makes the synthetic counterpart of londonite of interest as a potential neutron absorber or...a potential host for nuclear waste. Keywords: Londonite, crystal chemistry, crystal structure, single-crystal |  | | Journal (article/letter/editorial) | | ORIGINAL PAPER Stability of (Cs, K)Al4Be5B11O28 (londonite) at high pressure and high temperature: a potential...and the thermo-elastic behaviour of a natural londonite ½1a ðCs0:36 K0:34 Rb0:15 Ca0:04 Na0:02 ÞR0:91...thermo-elastic behaviour was observed. At T [ 973 K, londonite shows the first evidence of an irreversible structure...between 298 and 973 K is a0 = 2.38(6)10-5 K-1. Londonite shows an elastic behaviour up to 4.85 GPa. No...significantly high amount of boron (B2O3 * 50wt%), londonite-type G. D. Gatta (&) P. Vignola Dipartimento |  | | Catalog/List | | OCTOBER 15, 2015 ❘ NEW YORK The RAINBOW OF AFRICA GEM & MINERAL COLLECTION Front Cover: Gems from the...Signature® Internet Session 2 Heritage Auctions Design District Annex 1518 Slocum Street • Dallas, TX 75207 (HERITAGELive...collection, a lot of it collected when the Tsumeb Mine (as well as other mines of the region) were still...57070. The next part of the catalog is the African gem collection – an unheard of gathering of some of the...a family determined to create the finest African gem collection the world has ever seen. And they succeeded |  | | Journal (issue) | | _____________ 294 Chart of Commercially Available Gem Treatments Christopher P. Smith and Shane F. McClure...comprehensive, easy-to-use reference to the most common gem enhancements on the market today and their detectability...marketplace. 326 Rhodizite-Londonite from the Antsongombato Pegmatite, Central Madagascar Brendan M. Laurs,...and gemological characteristics of gem-quality rhodizite-londonite from its only known source. REGULAR...REGULAR FEATURES _______________________________ 340 Gem Trade Lab Notes • “Piranha” agate • Surface-treated |  | | Journal (issue) | | Euclase, 2.3 cm, from the Gachalá mine, Guavió-Guatéque mining district, Boyacá Department, Colombia. Gail...cm, from Stak Nala, Haramosh Mountains, Skardu district, Gilgit-Baltistan, Pakistan. Zach Goodman collection;...Budd photo. Tanzanite, 7.6 cm, from the Merelani mine near Arusha, Tanzania. Barry & Beth Kitt collection;...Fluorite on quartz, 13 cm, from the Yaogangxian mine, Chenzhou Prefecture, Hunan Province, China. The...Spodumene (variety kunzite), 9 cm, from the Urucum mine, Galiléia, Minas Gerais, Brazil. Gus & Jane Eifler |  | | Catalog/List | | Internet, Fax, and Mail) Heritage Auctions Design District Showroom 1518 Slocum Street • Dallas, TX 75207...17656. LOT VIEWING Heritage Auctions Design District Showroom 1518 Slocum Street • Dallas, TX 75207...A beautiful Crystallized Gold from the “16-to-1” Mine • A huge cut and polished Apache Agate weighing...classified Lunar Meteorite • Several vibrant iridescent “Gem” Ammonites in matrix • And multiple richly colored...Pallasite - PMG Hekandue River, Seymchan Magadan District, Russia This slice of the Seymchan Meteorite does |  | | Book | | Mount Malosa, Chilwa alkaline province, Zomba district. "Illite" is the name of a series of incompletely...Springfield show ( 1995: 582). Madawaska [Faraday] mine near Bow Lake, Hastings County. Some of the world's...property of, the old Madawaska uranium mine (called the Faraday mine before 1964). The mineral assemblage...Cowgill, 1977). LATINAMERICA BRAZIL Jacupiranga mine, Sao Paulo. Among the crystallized minerals in the...Oblast. Alpine-type clefts in the famous Dodo quartz mine commonly contain ilmenite, occurring as lustrous |
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Antsongombato gem mine, Antsentsindrano, Anosiarivo Manapa, Betafo District, Vakinankaratra, Madagascar