Onyx Bowl 4" Chakra: Heart Origin: Pakistan Green Onyx is part of the Chalcedony Quartz family. It has a triangular crystal structure. It has been around since prehistoric times but has been better known for its use in Ancient Greek times, where it got its name, Onyx, from the Greek word "fingernail". It was thought that Eros, the Greek god of love and sexuality, clipped his fingernails. When these nails fell to Earth, they turned into Onyx. Archeologists have discovered swords, amulets, shields, and even armor made from this stone. Green Onyx can be found in places such as Brazil, California, Uruguay, Peru, Mexico, Madagascar, and India. Chemical Formula: SiO2 Hardness: 7 ***NOTE TO BUYER*** This is a "random selection" listing. You will NOT receive the exact item photographed in the listing, but one that is very similar. However, due to the unique nature of each mineral the size, shape, and color may vary slightly.