Zircon

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.

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Currencies
1 x RB016 0.21Ct 5x3mm Oval Unheated Untreated Fiery Intense Pinkish Red RUBY Mozambique1 x RB013 Oval 0.68Ct 5.5x4.5mm Natural Unheated Untreated Pigeon Blood Red RUBY, Madagascar1 x RB032 Match Pair 2Pcs/0.49Ct 3.7mm Round Natural Unheated Untreated Fiery Pinkish Red RUBY1 x RB024 Perfect Pair 2Pcs/0.58Ct t.w Oval Natural Unheated Untreated Fiery Pinkish Red RUBY1 x LOT015 Lot 7pcs/1.12ct t.w 3-3.5mm Round Natural Unheated Untreated Fiery Pinkish Red RUBY1 x RB029 Perfect Pair 2Pcs/0.75Ct t.w Oval Natural Unheated Untreated Blood Red RUBY, Mozambique1 x RB019 GHI Certified Unheated Untreated 0.58Ct Pear Natural Pinkish Red Ruby1 x RB027 Perfect Pair 2Pcs/0.38Ct t.w Round Natural Unheated Untreated Rich Red RUBY, Mozambique1 x RB021 CERTIFIED 0.43Ct 4.5x4mm Oval Natural Unheated Untreated Red RUBY Mozambique1 x RB030 Match Pair 2Pcs/0.88Ct Pear Natural Unheated Untreated Fiery Pinkish Red RUBY1 x RB014 Oval 0.43Ct 4.5x4mm Unheated Untreated Intense Pinkish Red RUBY, Mozambique1 x RB002 Vs Marquise 0.47Ct 8x3.5mm Natural Unheated Untreated Fiery Intense Pinkish Red RUBY, Winza1 x RB033 Certified Match Pair 2Pcs/0.44Ct tcw Round Natural Unheated Untreated Rich Red RUBY1 x RB028 Perfect Pair 2Pcs/0.74Ct tcw Oval Natural Unheated Untreated Fiery Pinkish Red RUBY1 x RB012 0.55Ct 2Pcs Match Pair 5x3mm Oval Natural Unheated Untreated Fiery Pinkish Red RUBY1 x RB025 Certified Oval 0.61ct 5.5x4.5mm Natural Unheated Untreated Pigeon Blood Red RUBY1 x RB034 Match Pair 2Pcs/0.55Ct Baguette Natural Unheated Untreated Fiery Pinkish Red RUBY1 x RB004 Oval 0.58Ct 5x4.5mm Natural Unheated Untreated Top Red RUBY, Mozambique1 x RB031 Certified 0.59Ct 5.5x4mm Pear Natural Unheated Untreated Rich Red RUBY, Mozambique