Gemstones & Diamonds

We're accredited by the International Colored Gemstone Association! Explore the responsibly sourced spectrum and add stunning color to your designs.

Rio Diamond source

Don't see the diamond you want? Our Graduate Gemologists are happy to help source your diamond and answer any questions you have along the way. Contact Rio Grande Diamond Source—a personalized service dedicated to helping you find the perfect diamond.

Rio Grande Gem Source

Searching for a particular color, size or type of precious gem? Look to Rio Grande Gem Source, your personalized service to help you find the perfect gemstone for your customers. Contact one of our in-house gemologists today.

Looking for a Gemstone or Diamond? Let Us Help! We Leave No Stone Unturned.

If you are looking for the sparkling brilliance of a white diamond, the deep richness of a natural colored gemstone, or the ethereal beauty of an opal cabochon, Rio Grande is your source for the cut, color and size of gemstone you are looking for. It's easy to shop our entire stock of diamonds, faceted gemstones, cabochons and cameos online.

Our diamond selection includes mined white diamonds, colored diamonds and lab-created diamonds. Our white diamonds are available in round, princess cut, marquise, pear cut, or rose cut, and if you can't find the cut, color grading, clarity or carat you're looking for, Rio's in-house gemologists are here to help locate it for you. We have a large selection of color diamonds, including black, brown, blue, green, yellow and red and the Silvermist™ Gray.

If you're in the market for classic faceted gemstones or artisan-cuts, we have high-grade natural gemstones like rubies, emeralds, sapphires . We also have a vast selection of manmade faceted gemstones like moissanite, cubic zirconia (CZ) and simulated birthstones.

Rio Grande is also a great resource for cabochons, cameos and pearls. We have over 300 types of cabochons, including natural stone, crushed and simulated block stone for inlay work and a variety of other manmade and natural options. We also carry a wide variety of agate cameos—several of which are replicas of the famous works of Art Nouveau artist Alphonse Mucha. When shopping for pearls, choose from full-drilled pearl strands or half-drilled freshwater cultured pearls in a wide variety of sizes, shapes and colors. And for a real treat, shop our Akoya saltwater cultured pearls available in white and black.

Remember that if we don't carry it, we know where to find it. So if don't find what you're looking for on our website—no matter the size, shape, color or grade—just give us a call and our expert gemologists will find it for you.