Since 1981, Gemco International has combined Midwest-based service with access to the world's leading gemstone markets.
Through long-standing relationships in India, Thailand, and international markets, we source exceptional colored gemstones from many of the world's major producing regions.
Jaipur, India, is internationally recognized for emeralds and colored gemstones.
Thailand is a global leader in rubies, sapphires, cutting, treatment, and gemological expertise.
Our connections in these markets provide access to traditional trading networks and modern cutting centers, allowing us to source fine collector stones, matched pairs, calibrated gems, unusual cuts, and jewelry-quality material.
We evaluate gemstones based on color, clarity, cut, size, treatment, origin, and overall value—always with consideration for how the stone will be used.
For significant gemstones, laboratory documentation may be recommended to independently verify identification, treatment, and, when appropriate, geographic origin.
We primarily work with GIA and IGI, along with established gemological laboratories in Thailand and India.
International sourcing is built on long-term relationships, transparency, and responsible purchasing.
We work to understand the history and characteristics of the gemstones we offer and clearly communicate relevant information so you can buy with confidence.
For important gemstones, we can help determine when laboratory documentation is appropriate and guide you through the information provided.
Can't find the right stone? We can help.
Whether you need a fine sapphire from Sri Lanka, an emerald from Colombia or Zambia, a ruby from Mozambique, a tourmaline from Brazil or Africa, or something truly unique—our global network allows us to search beyond the ordinary.
Gemco International brings together more than four decades of experience in the Midwest and a global network of gemstone sourcing relationships—delivering exceptional colored gemstones from around the world with the personal service and expertise of a local dealer.
Local service. Global connections. Exceptional gemstones.