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Black Onyx

Black onyx was very popular in the Art Deco period in geometric designs adorned with marcasites.  Black onyx is not onyx but dyed black agate or chalcedony; it does not exist naturally.   If you don't see what you're looking for, contact us.  We offer custom jewelry without design fees.  We have thousands of gemstones and manufacturer our settings for a truly one-of-a-kind piece.