| Black Onyx Earrings Quartz formed, not as one single crystal, but from finely grained microcrystals is known as chalcedony. The variety of chalcedony is even greater than transparent quartz varieties, because it includes cryptocrystalline quartz with patterns as well as a wide range of solid colors.
Black onyx is a form of chalcedony quartz which owes its even black color to an ancient dyeing process that is still used today.
Onyx is the July birthstone (shared with Ruby) and the seventh anniversary gift. |
