The Untold Story Of Green Onyx Jewelry Green Onyx, with its hypnotizing shades of green, has been treasured from the beginning of time for its excellence and profound importance. It is a sort of chalcedony quartz, described by its smooth surface and clear appearance. The expression "onyx" begins from the Greek word "onyx," signifying "fingernail" or "paw," which is attributable to its similarity to a fingernail's clear sheen. The green shade of Green Onyx is frequently credited to the presence of iron minerals during its arrangement cycle.