Green Onyx Gemstone

The Onyx is occasionally used to described any engraved stone with a solid color base, or it may describe any banded gemstone with parallel banding. Onyx is black and white banded agate. Onyx is the gemstone for leos and is the anniversary gemstone for the seventh year of marriage. Some varieties of onyx differ in colour such as black, green where its most common form was a black base with a white upper layer. Onyx is an ancient gemstone, having been used in jewelry and as an ornamental gemstone.