A lot of varying black gemstones for jewelry making, predominately flat backed. Cat's eye scapolite, black onyx, black obsidian and tourmaline appear to be types. These are variations of oval, marquise, cushion, emerald, octagon, princess, pear & irregular & are all ready to be placed in jewel settings. Piece sizing runs from about a 1/2 inch to 2". Check out my other gemstone listings as well, will happily bundle for price & shipping savings. Feel free to ask any questions.