Zircon’s blue, almost always the result of heat treatment ... Rarely, zircon might contain long parallel inclusions that create the cat’s-eye effect when the stone is cut as a cabochon. It’s a ...
Figure 1. This 13.16 ct zircon is shown before (left) and just after 30 minutes of short-wave UV exposure (center). The SWUV lighting darkened the stone, while darkness restored the orange color. The ...
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What is the birthstone for December? Hint: There's actually three.The stone spans from blue to green in color ... is also given as a traditional gift for the 11th wedding anniversary. Zircon is the most diverse of December's birthstones since it comes in ...
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