Zircon is an important gemstone of many colors, and is an historical gemstone used for thousands of years. It is sometimes looked upon as a cheap Diamond simulant, but in actuality it can be a valuable gem. 

Its color diversity is caused by traces of certain impurities, some of which are radioactive. Zircon gemstones containing radioactive element traces undergo a process called metamiction, in which their inner crystal structure becomes destroyed. These radioactive forms of Zircon must be heated to stabilize them for use as gems. In fact, many of the gem forms of zircon (even those that are not radioactive) are heat treated to enhance color and increase transparency.

The radioactivity in Zircon gemstones is very minimal and is generally believed to be safe, without posing any health hazards.

Displaying 1 to 20 (of 62 products)
1 x AP186 Oval Cabochon 4.29ct 10x8x6mm Natural Unheated Green Apatite Cat's Eye1 x AP183 Round 2.37ct 7x4.2mm Natural Unheated Paraiba Blue Apatite, Tanzania1 x AE199 VS Octagon 3.79ct 9.7x8.2mm Natural Unheated Bi Color Ametrine Bolivia1 x AP188 Oval Cabochon 2.44ct 8.5x6.3x5mm Natural Unheated Yellowish Green Apatite Cat's Eye1 x AP185 Round 1.01ct 6.4x4mm Natural Unheated Paraiba Blue Apatite, Tanzania1 x AE010 Clean Antique Facet 7.20 ct Natural Unheated Bi Color AMETRINE Bolivia1 x AP193 Oval Cabochon 4.10ct 9.4x8.7mm Natural Green Cat's Eye Apatite Madagaskar1 x CE099 Oval Cabochon 3.19ct 9x6.7mm Natural Yellowish Green APATITE Cat's Eye1 x AP097 Octagon 1.32ct 5.6x7.9mm Natural Unheated Blue APATITE Madagaskar1 x AP119 Oval Cabochon 15.5x10.5mm 11.47ct Natural Yellowish Green Sharp Cat's Eye Apatite1 x AE300 Clean Oval Cut 7.33ct 14.5x12mm Natural Bi-Color AMETRINE Bolivia1 x AE011 VVS Round 11.5mm 6.36ct Purple Golden yellow Natural Unheated Citrine Bolivia1 x CE097 Oval Cabochon 2.19ct 7.8x7.3mm Natural Yellowish Green Cat's Eye Apatite1 x AP007 Octagon 1.05ct 7.83x4.9mm Natural Unheated Green APATITE Madagaskar1 x AE093 Clean Pear 6.20 Ct Natural Unheated Purple Golden yellow Ametrine Bolivia1 x AP180 Oval 1.32ct 7.5x6x4mm Natural Unheated Paraiba Blue Apatite, Tanzania1 x AP175 Oval 0.88ct 6.5x5.3x3.8mm Natural Unheated Paraiba-Color Neon Green Apatite, Brazil1 x CE098 Oval Cabochon 2.34ct 8x6.5mm Natural Yellowish Green APATITE Cat's Eye1 x AP171 Oval Cabochon 4.06ct 9.3x8.5x6.0mm Natural Yellowish Green Sharp Cat's Eye Apatite, Africa1 x AE118 VVS Heart 8.95ct 15X13mm Unheated Natural Purple Yellow Ametrine Bolivia