Kothari Trading was founded by diamantaire brothers, Raju and Suren Kothari. Over the course of 35 years, they expanded their business to dealing the finest precious stones, such as rubies, sapphires, emeralds, and natural fancy colored diamonds. We are headquartered in Hong Kong, with offices in Tokyo, Bangkok, and Taiwan, and have a global presence at trade shows and fairs worldwide.

The brothers are trusted sources for adventurous and unique gems. The more unusual the color, the rarer the stones are. Clients turn to our experience when seeking specialist advice to ensure they are making a sound investment. Our expert knowledge guarantees the provenance and authenticity of each stone to ensure its true value. By sharing our passion for colored stones, we develop a close relationship with clientele and our bespoke offerings ensure that our customers can expect unparalleled service for generations to come.

Clients seek to buy stones from us due to the exceptionally high quality of goods. The brothers are known for their ability to curate interesting, rare and special gems from around the world. We serve many clients globally, including famous brand houses and jewelers, who see us as trusted suppliers due to our reliability, discretion and high quality.