 | Sutthirat, C., Saminpanya, S., Droop, G. T. R., Henderson, C. M. B., Manning, D. A. C. (2001) Clinopyroxene-corundum assemblages from alkali basalt and alluvium, eastern Thailand: constraints on the origin of Thai rubies. Mineralogical Magazine, 65 (2) 277-295 doi:10.1180/002646101550253 | Journal (article/letter/editorial) | | assemblages from alkali basalt and alluvium, eastern Thailand: constraints on the origin of Thai rubies C. SUTTHIRAT1...University, Bangkok 10330, Thailand ABSTR ACT An inclusion of corundum (ruby) was found in a clinopyroxene...basalt from the lateCenozoic Chanthaburi-Trat volcanics of eastern Thailand. The clinopyroxene is fairly...WORDS : corundum, ruby, clinopyroxene, pyrope, sapphirine, alkali basalt, Thailand, xenocryst. Introduction...Introduction THAILAND is a world-famous source of gem corundum, including the distinctive varieties known |  | Yui, Tzen-Fu, Wu, Chao-Ming, Limtrakun, Phisit, Sricharn, Weerapan, Boonsoong, Apichet (2006) Oxygen isotope studies on placer sapphire and ruby in the Chanthaburi-Trat alkali basaltic gemfield, Thailand. Lithos, 86 (3) 197-211 doi:10.1016/j.lithos.2005.06.002 | Journal (article/letter/editorial) | | placer sapphire and ruby in the Chanthaburi-Trat alkali basaltic gemfield, Thailand Tzen-Fu Yui a,*, Chao-Ming...Science, Chiang Mai University, Chiang Mai 50200, Thailand Received 6 April 2005; accepted 8 June 2005 Available...online 1 August 2005 Abstract Placer sapphire and ruby are common in the western zone and the central/eastern...(C-T) alkali basaltic gemfield in southeastern Thailand. Sapphires have O-isotope composition in the range...The surface distribution of sapphire or ruby in the studied area may be a sign of composition variation |  | | Journal (issue) | | Tribute to Robert M. Shipley, Jr. The Chanthaburi-Trat Gem Field, Thailand Peter C. Keller 197 Gemstones...GEMOLOGY Winter 1982 185 THE CHANTHABURI-TRAT GEM FIELD, THAILAND By Peter C. Keller With th e recent...classic ruby m ine s of Burma, Th ailand has become th e wo rld 's major source of gem ruby. The majority...majority of the ruby produ ction, as w ell as som e significant sapphire produ cti on, comes from th e provin...of Ch an tliabut i an d Ttat in south eastern Thailand. Thi s article reviews th e geology of th ese |  | | Book | | Directly from Molten Rock: 71 The Ruby Deposits of Chanthaburi-Trat, Thailand PART III Gemstones Formed by...by Low-Pressure Regional Metamorphism: 87 The Ruby Deposits of Mogok, Burma 7. Gemstones Formed by...eruption, which describes the rubies of Chanthaburi-Trat, Thailand. As we go deeper into the earth's crust...low-pressure regional metamorphism examines the famous ruby deposits of Mogok, Burma. This is an admittedly...most important gemstone regions in the world. Its area is about that of West Virginia, and it is situated | | | Book | | Directly from Molten Rock: 71 The Ruby Deposits of Chanthaburi-Trat, Thailand PART III Gemstones Formed by...by Low-Pressure Regional Metamorphism: 87 The Ruby Deposits of Mogok, Burma 7. Gemstones Formed by...eruption, which describes the rubies of Chanthaburi-Trat, Thailand. As we go deeper into the earth's crust...low-pressure regional metamorphism examines the famous ruby deposits of Mogok, Burma. This is an admittedly...most important gemstone regions in the world. Its area is about that of West Virginia, and it is situated |  | | Journal (article/letter/editorial) | | sapphire-zircon-magnetite xenolith from the Chanthaburi Gem Province, Thailand ROBERTR. COENRAADS The Gemmological...Mineral Resources, Rama 6 Road, Bangkok 10400, Thailand AND F. [.IN SUTHERLAND Division of Earth and...magnetite-bearing xenolith from Khao Wua, near Chanthaburi in Thailand, conclusively demonstrates a common origin...magnetite found in alluvial deposits in the Chanthaburi gem fields. The original aluminium- and titanium-rich...alluvial zircons (2.57 ___0.20 Ma) from the Chanthaburi-Trat gem fields and within the potassium-argon |  | Kirkland, Christopher L., Danišík, Martin, Marsden, Ruby, Piilonen, Paula, Barham, Milo, Sutherland, Lin (2020) Dating young zircon: A case study from Southeast Asian megacrysts. Geochimica et Cosmochimica Acta, 274. 1-19 doi:10.1016/j.gca.2020.01.013 | Journal (article/letter/editorial) | | megacrysts Christopher L Kirkland, Martin Daniš ík, Ruby Marsden, Paula Piilonen, Milo Barham, Lin Sutherland...megacrysts Christopher L Kirklanda,b, Martin Danišíkb, Ruby Marsdena,b, Paula Piilonenc, Milo Barhama, Lin Sutherlandd...geochronology to zircon megacrysts from Cambodia and Thailand. These zircon megacrysts formed in mantle-derived...SIMS. Regional geology Southeast Asia, including Thailand and Cambodia, comprises two dominant crustal blocks...Indochina terrane, which extends from eastern Thailand, Laos, across Cambodia and into southern Vietnam |  | | Journal (article/letter/editorial) | | zircon inclusions in sapphires from the Central Province, NSW. gives ages of 35.9+ 1.9 and 33.7_+2.1 million...49Ma for the timing of volcanism of the Central Province, NSW. These data, combined with the observation...presumably determines whether a particular basaltic province carries sufficient corundum to be worked into...zircon, Central Province, Australia. Introduction A LARGEnumber of important sapphire and ruby gemfields are...and Berange, 1981); Chanthaburi-Trat, Denchai, Bo Ploi and Khorat Plateau in Thailand (Barr and MacDonald |  | Palke, Aaron C., Wong, Jacqueline, Verdel, Charles, Ávila, Janaína N. (2018) A common origin for Thai/Cambodian rubies and blue and violet sapphires from Yogo Gulch, Montana, U.S.A.?. American Mineralogist, 103 (3) 469-479 doi:10.2138/am-2018-6164 | Journal (article/letter/editorial) | | have been proposed for volcanically transported ruby and sapphire deposits around the world. In this...S.A., with rubies from the Chantaburi-Trat region of Thailand and the Pailin region of Cambodia. The...ought to be used with caution. Keywords: Sapphire, ruby, Yogo Gulch, melt inclusions, corundum, gemology...sapphires with minor ruby. However, the southeastern Asian nations of Thailand and Cambodia are important...were major suppliers of gem corundum (especially ruby) during the 20th century. Rubies are found here |  | | Journal (article/letter/editorial) | | ev A preliminary stable isotope study on Mogok Ruby, Myanmar Tzen-Fu Yui a,⁎, Khin Zaw b, Chao-Ming...Available online 3 June 2008 Keywords: Stable isotopes Ruby Spinel Forsterite Marble Mogok Myanmar (Burma) ...B S T R A C T The primary occurrence of ruby in the Mogok area, northern Myanmar is exclusively found...resulting most likely from fluid–rock interactions. Ruby-bearing marble and phlogopite–graphite marble follow...depletion trend with relatively constant δ13C values. Ruby formation might have resulted from CO2-rich fluid–rock |  | | Journal (issue) | | All About Colored Gemstones Special Thailand Route of the Ruby Bangkok Host of the ICA Congress 2019...Issue 42 All About Colored Gemstones Special Thailand 5 Editor’s Note Origins and the Responsible...World 10 14 24 28 32 34 38 44 48 60 Route of the Ruby 94 90 Bangkok Host of the ICA Congress 2019 ...Gemstone Association 46 Special Thailand Issue Thailand: The Undisputed Ruby Trading Kingdom Thai Gems and...by the Number Lapidary Art in Thailand Precision Gem Faceting in Thailand Top Grade – Women in the World |  | | Journal (issue) | | pleochroism o > e. The absorption spectrum in the visible area consists of a broad absorption band at 15 800 cm...about 17 000 c m 1 to the blue end of the visible area, and a weak shoulder at about 24100 c m 1 . The...from 17 000 cm" * to the blue end of the visible area. The absorption at 24000 c m 1 is not responsible...instinctively, i.e. a red stone could be natural/synthetic ruby, garnet, spinel, glass, etc., and the steps to follow...1984. XIX, 3 SAPPHIRES FROM KANCHANABURI PROVINCE, THAILAND By MAHINDA GUNAWARDENE, F.G.A., D. Gem. G |  | | Journal (issue) | | Malipo, China Inclusions in Corundum from Bo Welu, Thailand Fall 2019 VOLUME 55, No. 3 EDITORIAL 293 Gem...Inclusions in Ruby and Sapphire from the Bo Welu Gem Deposit in Chanthaburi, Thailand Supparat Promwongnan...and Color of Cultured Half-Pearls from Phuket, Thailand Kannika Kanjanachatree, Napapit Limsathapornkul...abalone shell blister • Large laboratory-grown star ruby and sapphire • Laboratory-grown sapphire with unusual...Sturman London, UK Manama, Bahrain Bangkok, Thailand John L. Emmett Lore Kiefert Fanus Viljoen |  | | Book | | anything other than yawns is always a scarce item. But Ruby & Sapphire is just such a book-a rare combination...face and fun, the pertinent and che peculiar. Open Ruby & Sapphire and you seep into a secret world where...few of the amazing and colorful tales within. Bur Ruby & Sapphire is also 1nuch more. T he product of over...is here, a virtual encyclopedia of the subject. Ruby & Sapphire highlights: • Side-by-side photos illustrate...book on precious stones or minerals, it should be Ruby & Sapphire, which is nothing less than a tour-de-force |  | | Journal (issue) | | determination. 580 Geographic Origin Determination of Ruby Aaron C. Palke, Sudarat Saeseaw, Nathan D. Renfro...Renfro, Ziyin Sun, and Shane F. McClure The world ruby market has undergone dramatic change in recent years...years, especially with the development of ruby mining in Mozambique. This contribution outlines GIA’s methods...criteria for establishing the geographic origin of ruby. p. 637 614 Geographic Origin Determination of...Carlsbad, California Lucerne, Switzerland Bangkok, Thailand John L. Emmett Ren Lu Fanus Viljoen Brush |  | | Journal (issue) | | in 79 CE and buried Pompeii and the surrounding area under a thick layer of ash. ARTICLES Gemmological...The Texture and Chemical Composition of Trapiche Ruby from Khoan Thong, Luc Yen Mining District, Northern...Schwarz, Federated International GemLab, Bangkok, Thailand; Menahem Sevdermish, Gemewizard Ltd, Ramat Gan...gemmology. Topics include diamond, jadeite, nephrite, ruby, sapphire, amber, emerald, coral, pearl, chalcedony...and it is not clear if it represents a new mining area or came from an existing deposit such as those in |  | | Journal (issue) | | Namibia|Stichtite| Zoned type IaB/IIa diamond| Synthetic star ruby p. 388 Klaus Schollenbruch photo ARTICLES ...Schwarz, Federated International GemLab, Bangkok, Thailand; Menahem Sevdermish, Gemewizard Ltd., Ramat Gan...Pornsawat Wathanakul, Gem and Jewelry Institute of Thailand, Bangkok; Chris M. Welbourn, Reading, Berkshire;...coloured stone trade between Thailand and Myanmar, ecommerce opportunities in Thailand and ASEAN, the jewellery...the Wah Wah Mountains of southwest Utah, USA. The Ruby Violet mine was the only commercial source of gem-quality |  | | 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...the science of gem testing and have covered that area very well. Details of the geological occurrence...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 | | | Book | | the science of gem testing and have covered that area very well. Details of the geological occurrence...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 |  | | Book | | industrialgrade corundum, came many small crystals of ruby and vari-colored sapphire which could be cut into...about to bring the traditional Ceylonese and Burmese ruby and sapphire mines to record production. The greatest...imagination prevailed. The doz¬ ens of "Ruby Creeks” and "Ruby Mountains” today are testimony to a garnet...garnet discovery that was first thought to be ruby. The many colors of common mineral crystals could pass...Alabama’s "Watempka Ruby,” an enormous six-ounce ruby announced as the largest gem ruby ever found in the |
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