 | | Journal (article/letter/editorial) | | 10, pp. 1053–1067. Genesis and Composition of Lazurite in Magnesian Skarns S. M. Aleksandrov and V. G...2004 Abstract—The genesis and composition of lazurite was considered in the metasomatic rocks and deposits...other regions. It was shown that formation of lazurite is related to the prograde bimetasomatic or contact–metasomatic...precursor. The formation of contact–metasomatic lazurite mineralization is promoted by high-alkali magmatic...which cause the replacement of dolomites by skarn. Lazurite can also be formed during the postmagmatic stage |  | | Journal (article/letter/editorial) | | Recently, however, the legendary lapis lazuli (lazurite) occurrence at Sar-e-Sang, Afghanistan, has produced...peculiar specimens containing large, relatively sharp lazurite and sodalite crystals in white marble. Associated...with pumice and other pyroclastic materials. One occurrence seems unrelated to igneous activity and may be...and zeolites in addition to the more familiar lazurite, sodalite, pyrite, and carbonates. There are two...the Edwards zinc mine, Edwards, Saint Lawrence County, New York. Here it was found sparsely as rounded |  | | Journal (issue) | | classification system. Jewelry courtesy of Ebert-Richter, Los Angeles, C A , and G. R. Hansen, St. Louis, M O . Photograph...-Photographers, Los Angeles, C A . Typesetting for Gems & Gemology i s b y Scientific Composition, Los Angeles, C...EDITORIAL STAFF Anthony R. Kampf Los Angeles, C A Robert E. Kane Los Angeles, C A John Kolvula Santa Monica... A. Meyer West LaFayette, Indiana Sallie Morton San lose, C A Editor, Gemological Abstracts Dona M.Dirlarn...Koivula Kurt Nassau Bernardsville, N/ Glenn Nord Los Angeles, C A Ray Page Santa Monica, C A George Rossman |  | | Book | | ) 859232-2 SAN R0AF - 00014 495-0428 _ 0-13- (pbk. ti c i L B u L p E A F A R SAN FON” I L A C...and such profound erosional features as the Grand Canyon, Ausable Chasm, and the like. The material in this...glassy to dull. Hardness: 9. Streak: Colorless. LAZURITE Luster: glassy. Hardness: 5-—5.5. Streak: blue... ZA aX Description of Minerals Actinolite Occurrence: Occurs generally in crystalline schists and...Remarks: A common rock-forming mineral. Albite Occurrence: Occurs in small crystals or, more often |  | | Book | | 319 4.5. Jadeite 322 4.6. Nephrite 326 4.7. Lazurite 330 4.8. Feldspars and pegmatites 333 4.9...insufficient sensitivity of analytical methods that the occurrence of exogenic and endogenic haloes around such...is the most expensive non-metallic mineral in the USA (going by cost of raw material), while the raw material...clinohumite, forsterite, corundum, ruby, sapphire, lazurite); albitite-greisen (beryl, chrysoberyl, emerald...admixtures) and physical properties (strength, occurrence of fissures) are of significance when evaluating |
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