our projects

The International Colored Gemstone Association (ICA), a non-profit organization, is the only worldwide body specifically created to benefit the global colored gemstone industry. ICA was founded in 1984 and is now comprised of over 700 gem industry leaders from mine to market, including miners, gem cutters, suppliers, retailers, trade associations, gemological laboratories, academia, museums, and more, from 47 countries who are devoted to advancing and promoting the knowledge and appreciation of colored gemstones.



From time to time we set some of our finest gems in jewelry, working with top designers and jewelers here in Bangkok. We are now offering some of these pieces to our clients. We would be glad to create custom jewelry for you with one of our fine gemstones.

silica adventure

Gem Silica

Imperial topaz, also known as precious topaz, is the rarest color of topaz — a golden-orange to pink hue. Fine specimens come from the Ouro Preto region in Brazil.

forest tours


The rarest and most expensive variety in the quartz family is a type of chalecedony known in the trade as gem silica. Colored a vivid greenish-blue by copper, this material is found in the USA, Taiwan and Peru.