Gemmological Institute of America (GIA)
www.gia.org
American Gem Trade Association (AGTA)
www.agta.org
SSEF (Switzerland)
www.ssef.ch
GIT (Thailand)
www.git.or.th
CISGEM (Italy)
www.cisgem.it
Carnet des Gemmologues, Gemmologistes Francophones
www.geminterest.com
CIBJO (The World Jewellery Confederation)
www.cibjo.org
International Colored Gemstone Association
www.gemstone.org
Gemmopolis (Diamonds, Gems and Jewelry Center)
www.gemopolis.co.th
The Canadian Institute of Gemmology
www.cigem.ca
The Gubelin Laboratory
www.gubelinlab.com
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¡ÃÁÊè§àÊÃÔÁ¡ÒÃÊè§ÍÍ¡
www.depthai.go.th
¡ÃÁÊè§àÊÃÔÁÍØµÊÒË¡ÃÃÁ
www.smethai.net
ªÁÃÁ¼Ùé¤éÒÍÑÁ³ÕáÅÐà¤Ã×èͧ»ÃдѺÁҵðҹ (Jewel Fest Club - JFC)
www.thaigemjewelry.or.th/demo/jfc/about_t.htm
ÊÁÒ¤Á¤éҷͧ¤Ó (Gold Traders Association)
www.goldtraders.or.th
ÊÁÒ¤Á¼Ùé¤éÒÍÑÁ³Õä·ÂáÅÐà¤Ã×èͧ»ÃдѺ
www.thaigemjewelry.or.th
ÊÁҾѹ¸ì¼Ùé¼ÅÔµ·Í§¤ÓáËè§âÅ¡ (World Gold Council)
www.gold.org
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Êӹѡ§Ò¹¡Í§·Ø¹Ê¹ÑºÊ¹Ø¹§Ò¹ÇԨѠ(Ê¡Ç.)
www.trf.or.th/
Êӹѡ§Ò¹¤³Ð¡ÃÃÁ¡ÒÃÍØ´ÁÈÖ¡ÉÒ (Ê¡Í.)
www.mua.go.th/
Êӹѡ§Ò¹¤³Ð¡ÃÃÁ¡ÒÃÇÔ¨ÑÂáËè§ªÒµÔ (Ǫ.)
www.nrct.go.th/
ÃкººÃÔËÒçҹÇÔ¨ÑÂáËè§ªÒµÔ (NRPM)
nrpm.nrct.go.th/
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