Black Onyx Ring - Sterling Silver This species of ammonites is

This species of ammonites is characterized by its ribbed shells and white exterior

essentially baking it to the proper color

This specimen is actually a unique formation of purple amethyst that can also contain hues of blue

They are related to the more popular ammonite

Black Onyx Ring - Sterling Silver This species of ammonites isThis ring features a wide shank with a unique geometric design. Size: 11 Stone Size: 15 x 20 mm Black Onyx is a variety of silicate minerals similar to agate. The primary difference is the formation of the chalcedony bands. Agates show curved banding while onyx shows parallel banding. The word onyx comes from the ancient Greek word "" meaning claw. The uses of onyx for jewelry, tools, and art can be traced back almost 5000 years. Black Onyx is a