 | | Report (volume) | | the world. Concise Field Report Volume 1: Pailin, Cambodia (Dec 2008 – Feb 2009) Vincent Pardieu GIA...Bangkok Figure 1: Rough natural ruby and blue sapphire from Pailin, Cambodia. Photo: V.Pardieu/GIA Laboratory............................ 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...four gemstones were ranked as 'precious'—diamond, ruby, sapphire, and emerald, together with pearl, which...stones were thought of as some inferior form of ruby, all green stones, some form of emerald, etc., with...from clear cut. Information on the behaviour of ruby and sapphire on heat treatment is known from the...direction. Purple sapphire could be converted to ruby by this treatment. Much less is known about the |  | | Journal (issue) | | 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'...'metamorphic' corundums (including ruby) and 'basaltic' type blue corundums. These represent different...sapphire, ruby, sapphirine, absorption spectra, trace elements, basalt, Barrington (Australia), Pailin (Cambodia)...1997). East Australia produces sapphire and rare ruby (Coldham, 1985; Olliver and Townsend, 1990; Sutherland |  | | Book | | bipyramid, tabular hexagonal prism Varieties: Red= ruby Blue = sapphire All other colours are termed sapphire...o-ray usually more intensely coloured than e-ray Ruby: o-ray = purplish red; e-ray = orangy red Blue sapphire:...blue; e-ray = greenish blue Absorption spectrum: Ruby (Cr) = fluorescent doublet at 694.2 and 692.8, narrow...and 470 nm (weakest) Ultraviolet fluorescence: Ruby = inert to strong red (long wave and short wave)...swirls), etc. Major sources: Burma, Thailand, Cambodia, Sri Lanka, India, Australia, Kenya, Tanzania |  | | Journal (issue) | | ct emerald, (13) 1.99 ct red beryl, (14) 0.72 ct ruby, (15) 1.15 ct purplepink sapphire, (16) 5.54 ct...among both jewelers and consumers. These included ruby from Mong Hsu, Myanmar (Burma); blue and pink sapphires...other beryls, alexandrite and other chrysoberyls, ruby and sapphire, diamond, garnet, jade [both jadeite...as alexandrite. CORUNDUM Ruby. The 1990s witnessed continued supplies of ruby from the Southeast Asian...important sources (i.e., Myanmar [figures 5 and 6], Cambodia, and Thailand, with significant decrease in the |  | | Book | | and improving the quality of major stones such as ruby. In addition, many new artificial materials have...serious interest in gemstones. Cover illustration: A ruby, sapphire, emerald, citrine and diamond clip, mounted...compared to salt or quartz, but not compared to ruby, the particular conditions needed for the formation...are much rarer. For example, the red and green of ruby and emerald require a source of chromium; without...without it the corundum and beryl minerals, of which ruby and emerald are special varieties would be colourless | | | Book | | compared to salt or quartz, but not compared to ruby, the particular conditions needed for the formation...are much rarer. For example, the red and green of ruby and emerald require a source of chromium; without...without it the corundum and beryl minerals, of which ruby and emerald are special varieties would be colourless...Burma rubies are formed in this type of rock. The ruby comes from corundum derived from clay impurities...auction houses a note stating that a particular ruby is from Burma or a particular blue sapphire from |
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