Article: Introducing sea blue chalcedony. (Gem Notes).(Brief Article)

Chalcedony is a natural microcrystalline quartz, and therefore never transparent. Used mostly as an ornamental gem, some of its better-known varieties are carnelian, sard, bloodstone, onyx and sardonyx, agate, and fire agate. Common translucent chalcedony occurs in a wide range of natural colors, with some of the more current discoveries made in blues and lavenders. With chalcedony's recent popularity--thanks to its pastel colors and inexpensive price range--it never hurts to be reminded that ...

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