Management

 
 

Mr.Sucheth Singsathidsuk (G.G.)

  • 1995-1996
  • Graduate Color Stone Grading – Diamond Grading and Jewelry Design ID &; (GIA)
  • 1996-2003
  • B.S.S. Co.,Ltd. Jewelry Manufacturing: Managing Director
  • 2003
  • Gemological Hallmark International. Co., Ltd. (Director)
  • 2004-2010
  • Diamond Grading course and Color Stone Identification course: Presentation / Teacher.
  • 2006
  • Private education in gemology, by Mr.Chris Decourteney Graduate Gemologist (FGA) :
  • 2006
  • Private education in gemology, by Mr. Mandaba Yannick, Graduate Gemologist.(HRD)
  • 2007-2010
  • Gem Testing Laboratory: Gemologist. (GHI)
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Mr. Bhuwadol Wanthanachaisaeng, Dr. rer. nat, G.G.

  • 1997
  • Bachelor Degree of Geology (Chulalongkorn University, Thailand)
  • 2000
  • Master Degree of Geology (Chulalongkorn University, Thailand)
  • 2001
  • Graduate Gemologist - G.G. (GIA)
  • 2005
  • Workshop and short course in Luminescence Spectroscopy: Applications in the Earth Sciences, Institut f?r Geowissenschaften-Mineralogie, Johannes Gutenberg-Universit?t Mainz, Germany
  • 2007
  • Dr. rer. nat. Mineralogy (Johannes Gutenberg-Universit?t Mainz, Germany)
  • 2007-2009
  • Lecturer (Faculty of Gems, Burapha University - Chanthaburi Campus)
  • Publications:
  • Wanthanachaisaeng, B., Saejoo, S., and Termpromraj, I., 2003. The comparative study on
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  • colour grading system of blue sapphire based on Munsell colour system. Geo- and Material-Science on Gem-Minerals of Vietnam, Proceedings of the International Workshop, Hanoi, October 01 - 08. pp. 195-199.
  • Wanthanachaisaeng, B., Häger, T., Hofmeister, W., 2005. Determination of pressure around
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  • inclusions in corundum crystals by the shift of Cr3+ luminescence bands. Gem- Materials and Modern Analytical Methods, Proceedings of the International Symposium, Hanoi, September 26 - October 2.
  • Wanthanachaisaeng, B. and Häger, T., 2006. Raman spectroscopic study of metamict zircon
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  • inclusions in corundum and their behavior on heat treatment. Proceedings of the 1st International gem and Jewelry Conference, December 6-9, Bangkok and Chanthaburi, Thailand. pp. 52.
  • Wanthanachaisaeng, B. and Häger, T., 2006. Pressure determination around metamict zircon
  •  
  • inclusions in corundum and their behavior on heat treatment. Proceedings of the 1st International gem and Jewelry Conference, December 6-9, Bangkok and Chanthaburi, Thailand. pp. 75.
  • Wanthanachaisaeng, B. and Häger, T., 2006. Pressure-mapping around inclusions in
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  • corundum crystals determined by the shift of Cr3+ luminescence bands. AOGS 2006, Singapore. pp. 901/1202.
  • Wanthanachaisaeng, B., Häger, T., Hofmeister, W., and Nasdala, L., 2006. Raman- und
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  • fluoreszenz-spektroskopische Eigenschaften von Zirkon-Einschlüssen in chrom- haltigen Korunden aus Ilakaka und deren Veränderung durch Hitzebehandlung. Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 55, pp. 123-136.
  • Váczi, T., Nasdala, L., Wirth, R., Wanthanachaisaeng, W., and Häger, T., 2007. Potential
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  • problems in the annealing of zircon. Goldschmidt Conference Abstracts, pp. A1049.
  • Nasdala, L., Ruschel, K., Miletich, R., Hanchar, J.M., Wanthanachaisaeng, B., and Häger, T.,
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  • 2007. Spectral changes of zircon at elevated pressure. Mitt. Österr. Miner. Ges. Vol.153.
  • Wanthanachaisaeng, B. and Häger, T., 2007. Crystallinity and phase change of zircon
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  • inclusions in corundum from Ilakaka, Madagascar caused by heat treatment. AOGS 2007, Bangkok, Thailand.
  • Wathanakul, P., Wanthanachaisaeng, B., Häger, T., and Wongkokua, W., 2007. LA-ICP-MS
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  • and photoluminescence study of Be heat-treated Songea corundum. German-Thai Symposium-Nanaoscience and Nanotechnology, Kasetsart University.
  • Wanthanachaisaeng, B., Häger, T., Hofmeister, W., 2008. Detection of heat treatment in
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  • rubies and sapphires from Ilakaka. Proceedings of the 2nd Internatitonal Gem and Jewelry Conference. GIT 2008, Bangkok and Kanchanaburi, Thailand, pp. 86.
  • Wanthanachaisaeng, B., Bunnag, N., Sutthirat, C., Papawarin, O., and Pisutha-Arnond, V.,
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  • 2008. Metamictization of zircon in corundum-bearing basalt in Bangkacha, Chanthaburi, Thailand. Proceedings of the 2nd Internatitonal Gem and Jewelry Conference. GIT 2008, Bangkok and Kanchanaburi, Thailand, pp. 106.
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Miss. Rattana Boonmahamitranont. (Gemologist)

  • 2005
  • Graduate Color Stone Grading – Diamond Grading; (GHI)
  • 2006-2007
  • Diamond Grading course and Color Stone Identification course: Teacher.(GHI)
  • 2007-2010
  • Gem Testing Laboratory: Gemologist. (GHI)
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Mr. Noah Severs, A.G.

  • 2004
  • Accredited Gemologist – A.G. (AIGS)
  • 2005
  • Mine Expeditions: Cambodia, Laos, Thailand
  • 2006
  • Co-Managing Director American Gemstone Authority, LLC (Gemstone Sourcing & Jewelry Manufacturing)
  • 2008
  • Bachelor Degree of Business Administration (Ramkhamhaeng University, Thailand)
  • 2009
  • Production Director, American Gemstone Ltd. (Thailand) CEO, American Gemstone Authority, LLC (USA)(Contract Jewelry Manufacturing)
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