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 ...

The stone ranges from blue to green in color ... Turquoise is also given as a gift for the eleventh wedding anniversary. Zircon is the most diverse of the three December birthstones, coming ...

Its wide and varied palette of yellow, green, red, reddish brown, and blue hues makes it a favorite ... can be reversed somewhat by heating zircon to high temperatures. High-temperature heat treatment ...