 | | Book | | Distributed by Crown Publishers, Inc., 225 Park Avenue South, New York, New York 10003 All rights reserved. No...the stratified structure of feldspars. Precious opal exhibits a brilliant play of colours called opalescence...thick plates of rock crystal - a, smoky quartz - b, opal - c, and jasper - d .. ffffJ.t.i1!!}~{{tt1tWiiP{:...displaying numerous microscopic inclusions, such as opal and cordierite. Pearly lustre - typical of transparent...may be distinguished: - conchoidal (eg quartz or opal); - uneven (eg arsenopyrite or pyrite); - hackly | | | Book | | Distributed by Crown Publishers, Inc., 225 Park Avenue South, New York, New York 10003 All rights reserved....the stratified structure of feidspars. Precious opal exhibits a brilliant play of colours called opalescence...thick plates of rock crystal — a, smoky quartz — b, opal — c, and jasper —d Transparent minerals — when...displaying numerous microscopic inclusions, such as opal and cordierite. Pearly lustre — typical of transparent...may be distinguished: — conchoidal (eg quartz or opal); — uneven (eg arsenopyrite or pyrite); — hackly |  | 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) | | Dept. of Mineralogy, National Museum, Prague, Czech Republic. Seppo Lahti: Geological Survey of Finland...Smithsonian Inst., Washington, D.C. Alan Pring: South Australian Museum, Adelaide, SA, Australia. Gunnar...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 |  | | Book (edition) | | Aus1rnlia. Thomas Nelson Aus1r.1lia. 102 Dodds S1rce1. South Mdbournc. Vic1oria 3205. Auslr.ilia Chapman & Hall...9 (for 1 952). p. 99. From (TL) Crackers Well. South Australia. Australia. Deposit located by air-borne...1 892) Syst. Mi11., 6th ed .. p. 50. A term of South American origin describing galena in granular form... Z=4 fPDF 29-330). (TL) Dutoitspan, Kimberley, South Africa. Named for A.F. Williams. Agalitc, syn. of...shown to be a mixture of Ni(OH)2 • gibbsitc. and opal by G.S. Grit7�1cnko. N.K Aidinyan and V.P. Butuzov |
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