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Fine Jewelry University

1. 

   Gem in the Spotlight: Opal

   FJU Category: Gemstones | Tags: Folklore, Gem Spotlight, Gemology, Opal

   … proper care opals can last for generations. Opals have very high water content, typically hovering around the 5-10% mark. As opals dry out over time they can sometimes crack at the surface, which is called crazing. As of this writing … (see above). Other names for this kind of opal include: jelly opal and water opal. Australian Opal: This is a somewhat vague term that can be used to describe any opal that comes from Australia. In everyday conversation, some people use …