 | | Report (volume) | | the world. Concise Field Report Volume 1: Pailin, Cambodia (Dec 2008 – Feb 2009) Vincent Pardieu GIA...Rough natural ruby and blue sapphire from Pailin, Cambodia. Photo: V.Pardieu/GIA Laboratory Bangkok,............................ 4 AN INTRODUCTION TO PAILIN ....................................................... 8 THURSDAY, DEC 18TH, 2008: ARRIVING IN PAILIN: ................................................................................ 8 NOTES ABOUT PAILIN CURRENT ECONOMY AND SEVERAL SECURITY ASPECTS: |  | | Journal (issue) | | Branch: M. P. Gayton, F.G.A. South Yorkshire & District Branch: 1. R. M. Lewis, F.G.A. Examiners: B. W...Miner., 41, 428-36. Zwaan, P. C. (1974): Garnet, corundum and other gem minerals from Umba, Tanzania. Scripta...INTRODUCTION The subject of heat treatment of corundum has been touched upon only lightly in the gem...Sri Lanka, in search of a type of milky white corundum that has become known as 'Geuda stone' (possibly...similar deceptions with all colours of synthetic corundum. The pink synthetic sapphire shown here was beautifully |  | | Journal (issue) | | April 1998 ISSN: 1355-4565 Distinctive gem corundum suites from discrete basalt fields: a comparative...comparative study of Barrington, Australia, and West Pailin, Cambodia, gemfields F.L. Sutherland1, D. Schwarz2,...ABSTRACT: Barrington, Australia, and West Pailin, Cambodia, basalt fields yield remarkably similar 'metamorphic'...with variable relative intensities. Keywords: corundum, sapphire, ruby, sapphirine, absorption spectra...(Australia), Pailin (Cambodia) Introduction Fast Australia and South East Asia exploit rich corundum deposits |  | | Book | | Fraquet Beryl John Sinkankas and Peter G. Read Corundum Richard W. Hughes Garnet John D. Rouse Jet ...Topaz D. B. Hoover Butterworths Gem Books Corundum Richard W. Hughes Executive Vice President, Asian...in Publication Data Hughes, Richard, W. Corundum. 1. Corundum I. Title 553.8'4 ISBN 0-7506-1006-9 Library...Cataloging in Publication Data Hughes,Richard. W. Corundum/Richard W. Hughes. p. cm.-{Butterworths gem books)...Bibliography: p. Includes index ISB!'i 0-7506-1006-9: 1. Corundum. I. Title. II. Series. QE391.C9H84 1990 553.~c20 |  | | Report (issue) | | Distribution of volcanic features in Longwan district (listing 6) of Manchuria. Modified after Ogura...volcanic features (filled circles) in Qixingshan district (listing 10) of Manchuria. Shuangliao is a city...Wudalianchi (five connected lakes) district (listing 20) of Heilongjiang Province, northeastern China. Lakes...interpretation of volcanic features of Hsing-an (Xingan) district (listing 28) of Manchuria and Mongolia. (Modified...Teng-yueh (Tengchong). The volcanic rocks of this district were divided into three distinct groups: an early |  | | Journal (issue) | | cat’s-eye chrysoberyl as well as alexandrite. CORUNDUM Ruby. The 1990s witnessed continued supplies of...important sources (i.e., Myanmar [figures 5 and 6], Cambodia, and Thailand, with significant decrease in the...originated from Southeast and southern Asia (Thailand, Cambodia, Myanmar, Vietnam, and Sri Lanka; again, see figure...Localities of the 1990s GEMS & GEMOLOGY Winter 2000 Corundum—Ruby. As was the case with emeralds, ruby prices...the past three to four years (figure A-1, top). Corundum—Sapphire. Although sapphire largely escaped the |  | | Book | | temperature below its melting point; the rutile in star corundum precipitates out in star-like rays when the crystal...to approximately 1500°C (the melting point of corundum is 2037°C). arborescent with a branching, tree-like...emerald require a source of chromium; without it the corundum and beryl minerals, of which ruby and emerald...formed in this type of rock. The ruby comes from corundum derived from clay impurities in the original limestone...rock crystal • apatite in garnet, kornerupine, corundum and spinel • chromite in emerald • diamond in |
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