Gemstones & Diamonds

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 colored gemstone, or the ethereal beauty of an opal cabochon, Rio 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.  

Rio’s diamond selection includes natural white diamonds, colored diamonds and lab-created diamonds. We have proudly earned certification from the Responsible Jewellery Council, verifying that we are in compliance with the Kimberley Accord and that every diamond you buy from Rio Grande is 100% conflict-free. Our natural 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. We carry Renaissance™ lab-created diamonds, which are chemically, physically and optically identical to natural diamonds. Popular with younger buyers, lab-created diamonds are great for use as small side stones in popular ring styles, or to offer clients a larger, brighter diamond at a much lower price point! For your convenience, we keep a large amount of diamonds in stock, if you’re ordering a diamond less than 0.50 carats in size, place your order before 4:30PM MT and we will ship the same day. We also stock larger lab-created diamonds that can ship out the same day too—just contact one of our gemologists for assistance. 

If you’re in the market for classic faceted gemstones or artisan-cut specialty gemstones, look no further than Rio. We have high-grade natural gemstones like rubies, emeralds, sapphires and specialty gemstones like Glenn Leher’s TorusRing™ and the Vortex™ cut by Sherris Cottier Shank. We also have a vast selection of manmade faceted gemstones like moissanite, cubic zirconia and simulated birthstones. 

Rio is also a great resource for cabochons, cameos and pearls.  We have over 300 types of cabochons, including natural stones, crushed and block stone for inlay work and a variety of manmade 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 or half-drilled freshwater or Akoya (saltwater) cultured pearls in a wide variety of sizes, shapes and colors. And for a real treat, shop our handcarved Galatea pearls in a variety of captivating designs.

Always look to Rio when it comes to finding the perfect gemstone for your jewelry design. 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.