 | | Report (issue) | | recent marine sediments. Association: Quartz, \opal," \hornblende," pyroxenes, olivine, mica, kaolinite...Geilsdorf and Wolkenstein, Saxony, Germany. At Faratsiho, Madagascar. In the Burra copper mine, South Australia |  | | Journal (article/letter/editorial) | | 0.57 Total. 99.64 L. J. S. Thorianite from Madagascar. A. LACROIX (Bull. Sdc.Jranp. i74in., 1.914,...from the province of Betroka in the south of Madagascar are described, but unfortunately no information...A1203,4Si0,]. L. J. S. Opal and a New Mineral (Farataihite) from Faratsiho, (Bull. Soc. franp. A h .... , 1914, [i.e., 19151, Madagascar. A. LACROIX 37, 231--236).-Altered phonolitic trachyte in the neighbourhood...pockets of opal. This is usually white and opaque (cacholong), but the gem varieties (precious opal and fire-opal) |  | | Journal (article/letter/editorial) | | o i x , »Sur le mineral colorant le plasma de Madagascar et sur la ο έ ^ ο η ί ΐ β : Bull. Soc. Fran?...231—236) beschrieben. Das Mineral stammt von Faratsiho, Madagaskar. Die Phonolith- und Trachytdome von...vorhanden. (Hydrophan, Kacholong usw.) Mit diesem Opal ist eine hellgelbe (kanariengelbe) Masse vergesellschaftet |  | | Journal (article/letter/editorial) | | Occurs with opal filling veins in decomposed phonolitie trachyte near Faratsiho, Madagascar. Named from...Grossouvre (1901; third list) for a pulverulent opal from u dSp. Cher. Grothine. F. Zambonini, 1918....a l . O. Hauser, 1911. A German name for porous opal. Schwimmstein). Centralblatt Min., 1911, p. 436 |  | | Journal (issue) | | Kenya, Zimbabwe, Nigeria, and Namibia, as well as Madagascar), South America (Brazil and Colombia), central...Myanmar (Burma); blue and pink sapphires from Madagascar; a wide variety of colored stones from southern...diamond, garnet, jade [both jadeite and nephrite], opal, peridot, quartz, spinel, tanzanite, topaz, and...small stones (0.05 to 1 ct) of high quality. Madagascar and Zambia tend to produce cleaner but slightly...were Nigeria, Mozambique (figure 3), Zambia, and Madagascar. In particular, the availability from Zambia |  | | Journal (issue) | | courtesy of Rio Tinto; (4) an 11.16 ct sapphire from Madagascar, GIA Collection no. 31618; (5) a 1.01 ct yellow...competitive rough diamond market. Political problems in Madagascar and a ban on gem exports from Myanmar disrupted...for gemstones. New Deposits and New Operations. Madagascar. Much of the global gem business for well over...in the middle of the decade was dominated by Madagascar. This was due in part to the Malagasy PRODUCTION...exports ended in July of 2009, the mining sector in Madagascar failed to get jump-started as a result of the |  | | Journal (issue) | | and Hope Diamonds . . . Opals from Ethiopia—and Madagascar Composite Turquoise . . . Microtomography of...originated from the same crystal. 90 Play-of-Color Opal from Wegel Tena, Wollo Province, Ethiopia Benjamin...Gaillou Describes a major new source of high-quality opal with a mostly white bodycolor. Carat Points NOTES...Choudhary 114 New Occurrence of Fire Opal from Bemia, Madagascar Martina Simoni, Franca Caucia, Ilaria...Effects of Heat Treatment on Zircon Inclusions in Madagascar Sapphires Faceting Transparent Rhodonite from |  | | Report (issue) | | ••• ••• ... ... • •• French \Vest Africa Madagascar • •• • • •• 96 • •• ••• • •• 97 ••• ...emerald, ruby, sapphire and precious or '' noble '' opal, bu·t no line can be drawn between the semiprecious... Even the emer,a1d, ruby, sapphire and precious opal are only exceptionally beautiful and rare varieties...effects seen in the play of colo-u rs of precious opal is due to interferenqe of light which takes place...contact with grease or water. Pearl, turquoise and opal are· liable to abrasion and are porous ; they therefore |  | Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy (8th ed.) Wiley-Interscience. p.1872 | Book (edition) | | extent of producing diffraction patterns (e.g., opal), (2) metamict materials that were crystalline at...few materials by X-ray diffraction order (e.g., opal). Lattice constants are generally derived es be...fibrous minerals Columbite, wolframite Quartz Opal, some yellow varieties of sphalerite Nepheline Tale...Mineralogical Magazine A. LaCroix, Mineralogie de Madagascar, 1922 P. Embry and Fuller Manual of New Mineral...Brazil, and Czech Republic; minor deposits in Madagascar, Turkey, Romania, Germany, Austria, and Sri Lanka |  | | Book (edition) | | included among minerals, as the pearl of an oyster, the opal-silica (tabasheer) secreted by the bamboo, etc....rare is true of a piece of glass, and nearly so of opal. among minerals. A piece of feldspar which has...called colloid or jelly-like, internally, as most opal. from the Greek /coXXa (see p. 8), for glue. The...Honey-yellow: grayish yellow with some brown; sphalerite, opal. 5. Lemon-yellow: yellow, with some red and brown;...red and some blue; axinite. 3. Hair-brown: wood-opal. 4. Broccoli-brown: brown, with and zircon. 5. Chestnut-brown: |  | | Book (edition) | | shown to be a mixture of Ni(OH)2 • gibbsitc. and opal by G.S. Grit7�1cnko. N.K Aidinyan and V.P. Butuzov...); phosphate-enriched allophanc. Alo Allophane opal. syn. of schrbtterite. T. Egleston ( 1 887) Car...aluminian britholite from Siberia. Alumocalcite, var. of opal. A B reithaupt ( 1 832) Char. des Mineral-Syste111s...Mineral-Syste111s, p. 97 (Alumocalcil). A variety of opal with alum inn and lime impurities. Alumo-chaJcosiderite...Min. 38. 265. Orthorhombic. (TL) Ambatoarina. Madagascar. Named for locality. Amber. a fossil resin. Contains |  | | Book | | Japan, 462 Switzerland, 510 Tanzania 463 Madagascar (Malagasy Republic), Malawi Nepal, 482 513...beryl emerald 2 15th-20th emerald c. beryl opal agate 67 18th-20th 68 c. (1832) Blum emerald... beryl agate emerald turquoise pearl agate opal emerald beryl chalcedony aquamarine agate,...46 emerald beryl emerald aquamarine agate opal (1933) 69 Grant-Taylor agate emerald (1936)...golden beryl 18th-20th-century period, to expand opal, chalcedony, onyx, and others traditional by citizens |  | | Book | | a crystalline 11 limestone at Ambatoarina, Madagascar. Compare Ancylite (G. Flink, 1900; 2nd List.)...ortho¬ rhombic) prisms in pegmatite at Ampangabe, Madagascar. It approximates in composition to the heterogeneous...Befanamite. A. Lacroix, 1923. Mineralogie de Madagascar, vol. 3, p. 311. The scandium endmember of the...group (containing also zirconium) from Befanamo, Madagascar, as distinct from the Norwegian thortveitite...46, p. 767. Two small crystals from Manjaka, Madagascar, are thought, on X-ray data, to be TaB04. Named |  | | Book | | it chloropal from the Greek meaning "green" and "opal." Later, Glocker (1839) described the same material...seaimentary origin, containing 25%> organic silica (opal, chalcedony, quartz) and small amounts of sericite...describe a pale yellow mineral found near Faratsiho, Madagascar. It is a basic hydrous silicate of alunninum...une nouvelle espece minerale (faratsihite) de Faratsiho (Madgascar) Bull. Soc. fran^., Min. vol. xxxvii...Cretaceous beds in the same to the pulverulent opal, locality. Bristow, H. W. (I86I) A glossary of |  | | Report (issue) | | Brandes (1822). Described as occurring mixed with opal. Brandes, analyst. The United States National Museum...crystalline form. The clay called faratshite from Madagascar (Lacroix, 1914) has been shown by Hendricks (1939)...nouvelle espece mine'rale (faratsihite) de Faratsiho (Madagascar): Soc. frpng. mine'ralogie Bull., tome 37 |  | | Book (volume) | | 1939. Observations sur quelques minéraux de Madagascar. Bull. Soc. Frang. Min., 62, 300-8. Lal, R. K...Scotland (Haslam 1968). 10 Pargasite, southeast Madagascar (Majmundar 1969). 11 Hornblende, range of 21...present in the low-temperature eclogite of Faratsiho, Madagascar (Nicollet 1989). The earliest amphiboles...1-41. Majmundar, H. H. 1969. Pargasites from Madagascar. Can. Min., 10, 97-100. Makino, K. & Tomita,...287-308. Nicollet, C. 1989. L’éclogite de Faratsiho (Madagascar): un cas exceptionnel de métamorphisme de |
|
