About

Justin Prim

Justin K Prim is an American lapidary and gemologist living and working in Bangkok, Thailand. He has studied gem cutting traditions all over the world as well as attending gemology programs at GIA and AIGS. He is currently working on a book about the worldwide history of gemstone faceting. He works as a Faceting Instructor for the Institute of Gem Trading as well as writing articles, producing videos, and giving talks about gem cutting history.

Articles by


Justin Prim

Bangkok: City of Gemology Schools

Bangkok is the center of the colored gem trade. Compare the top four Bangkok gemology schools and see why this city is the ideal place to learn about…