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Gemstone Articles
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2020-03-06: BLUE RICHTERITE
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0.42 Mb
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วันที่ 13 เดือน December ปี 2565
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2020-02-16: An Update on Mineral Inclusions and Their Composition in Ruby from the Bo Rai Gem Field in Trat Province, Eastern Thailand
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0.42 Mb
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วันที่ 13 เดือน December ปี 2565
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2020-02-16: MINERAL INCLUSIONS IN RUBY AND SAPPHIRE FROM THE BO WELU GEM DEPOSIT IN CHANTHABURI, THAILAND
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2019-10-26: Blue Diffusion-treated Natural & Synthetic Sapphires recently available in the Market
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4.06 Mb
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2019-09-30: Characteristics of Tairus Hydrothermally-Grown Synthetic Ruby and Blue Sapphire
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5.63 Mb
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2019-08-29: Gemmological and Chemical Characteristics of Yiqisong peridot, Jinlin, People Republic of China
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0.18 Mb
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2019-02-26: Squeezing Sapphire • Corundums treated with high temperatures and low pressure (HT+P)
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2018-09-18: Characteristics of Faceted-Quality Ruby from Longido, Tanzania
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0.35 Mb
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2018-09-04: Sri Lankan Sapphire Enhanced by Heat with Pressure
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5.73 Mb
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2010: Provision of Full Disclosure Practices for Gem Trade
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0.06 Mb
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201
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นางนันทวัลย์ ศกุนตนาค
อดีตปลัดกระทรวงพาณิชย์
(29 มิ.ย. 2564 - ปัจจุบัน)
Email: rphusit@git.or.th
Tel: 0-2634-4999 633
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