 | | Journal (issue) | | Robert M. Shipley, Jr. The Chanthaburi-Trat Gem Field, Thailand Peter C. Keller 197 Gemstones with Alexandrite...GEMOLOGY Winter 1982 185 THE CHANTHABURI-TRAT GEM FIELD, THAILAND By Peter C. Keller With th e recent drastic...of Ch an tliabut i an d Ttat in south eastern Thailand. Thi s article reviews th e geology of th ese...gical Institute of America 186 Chanthaburi -Trat, Thailand hailand has been a world supplier of gem ruby...gem rubies come from Thailand. Of these, 85% to 90% come from the Chanthaburi-Trat district alone (Aranyakanon |  | | Book | | Rock: 71 The Ruby Deposits of Chanthaburi-Trat, Thailand PART III Gemstones Formed by Very High Temperatures... which describes the rubies of Chanthaburi-Trat, Thailand. As we go deeper into the earth's crust, we...along with the surrounding area in Sabaragamuwa Province, the major gemproducing area on the island. The...located about 115 km northeast of Colombo in Central Province, has grown in importance to become the second...the Matale and Polonnaruwa districts of Central Province. Most mining activity is along the Kalu Ganga | | | Book | | Rock: 71 The Ruby Deposits of Chanthaburi-Trat, Thailand PART III Gemstones Formed by Very High Temperatures... which describes the rubies of Chanthaburi-Trat, Thailand. As we go deeper into the earth's crust, we...along with the surrounding area in Sabaragamuwa Province, the major gemproducing area on the island. The...located about 115 km northeast of Colombo in Central Province, has grown in importance to become the second...the Matale and Polonnaruwa districts of Central Province. Most mining activity is along the Kalu Ganga |  | | Book | | Asian Institute of Gemological Sciences, Bangkok, Thailand Butterworth-Heinemann London Boston Singapore...(colour swirls), etc. Major sources: Burma, Thailand, Cambodia, Sri Lanka, India, Australia, Kenya...sapphire - Sri Lanka 77 Ruby - Thailand and Cambodia 80 Sapphire - Thailand 86 Sapphire - Pailin, Cambodia...areas 251 Burmese sapphires 252 Bibliography 253 Thailand and Cambodia 254 History 254 Mining areas 261...belief in the mining areas of Sri Lanka, Burma and Thailand that sapphires are nothing more than unripened |  | | Book | | 374 • RUBY & SAPPHIRE 17 329 296 Kenya Thailand/Camborua 374 Two geologists' dream: T heir own...of Thailand/Cambodia ruby 439 Characteristics ofThai/Cambodian sapphire 442 Bibliography-Thailand/Cambodia...to the rubies, sapphires and jade of Burma and Thailand, jewels and jewelry are a constant fixture. India...destined to become my home for over a decade. Thailand was, is, and probably always will be, one of those...was off visiting che Cainbodian border, Mae Sai, Bo Ploi, Phrae, Chanthaburi, India, Sri Lanka, Burma |  | | Book | | of SE Asia (Vietnam, Laos, Cambodia, Malaysia, Thailand, Indonesia, Myanmar and Malaysia), and has published...included rubies largely from South East Asia: Thailand/Cambodia, Sri Lanka, Mogok and Myanmar, but also...the main blue sapphires were sourced from the Thailand/Cambodia, Sri Lanka, Mogok, Myanmar and Montana...suites occupy a further five figures within the text. Thailand/Cambodia suites, studied from the important Chanthanburi...monogenetic. Polygenetic examples include the Thailand/Cambodia and Mogok, Myanmar deposits, although |  | | Journal (issue) | | Lucerne, Switzerland Kenneth Scarratt Bangkok, Thailand C. W. Fryer Santa Monica, California John I...stone was from a basalt-hosted deposit (such as Thailand); microscopy also indicated a basaltic origin...1981; Sutherland et al., 1998) Thailand—Chanthaburi, at Bo Rai–Bo Waen (Charaljavanaphet, 1951; Gübelin...Chamberlin, 1995) China—Aliao Mountains, Yunnan Province (Keller and Fuquan, 1986; ICA Gembureau, 1991)...associated with alkali basalts (e.g., Cambodia and Thailand). However, the formation conditions of this type |  | | Journal (issue) | | Kane Helena, Montana Kenneth Scarratt Bangkok, Thailand Shigeru Akamatsu Tokyo, Japan Jaroslav Hyršl...instrumentation such as LA-ICPMS—once primarily the province of academia—became a fixture in many gemological...other means, mainly through illicit smuggling into Thailand. Other Producers. Colombia remained the major...Association show was down 19% (Weldon, 2009). Thailand, which accounts for 70% of the world’s polished...to $201.5 million (Gem and Jewelry Institute of Thailand, 2010). By late 2009, colored stone dealers were |  | | Book | | Examples of twinning can be seen in rubies from Thailand and in the feldspar gemstones. Zones of growth...haloes. Siam rubies, as the stones from what is now Thailand are still known (the name is often given to any...iron spinel, hercynite, occurs in red spinel from Thailand; calcite crystals are found in Burmese spinel...which have raised titanium levels. Rubies from Thailand and many from Sri Lanka are found to be markedly...similar. A coloured oil is reported to be used in Thailand. Foiling and coating are rare in corundum gems |  | | Book (edition) | | contributors from Australia, Canada, Germany, Thailand, Vietnam, the UK and the USA, making this a truly...groundmass of pale brown glass and tiny grains of magnetite. Island of Mull, Scotland igneous rocks was based...quartz (clear), feldspar (pale brown, ‘dusty’) and magnetite (black). Field of view: 4 mm across. St Kilda...sapphires and zircons found close to basaltic flows in Thailand, Australia 11 The Geological Sources of Gems...intermediate and acid members of the volcanic province in southern Brazil and Uruguay, and the fire opals |
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