Buy Zircon Gemstones Online At Wholesale Prices. We have a large selection of beautifully faceted Zircon gemstones from all over the world. Some of the common locations include Cambodia, Tanzania and Asia. They have great dispersion which means they display fire just like a Diamond. Most of the stones have been heat treated. This is common practice for this type of stone. Our verified sellers have access to a wide range of mine sites that provide rough material and already cut gems for sale here on Gem Rock Auctions.