This earring is based on a very irregular miniature Oyster shell with rough and totally random surface. While most Oysters shells are irregular on the surface they follow a pattern that is somewhat predictable. This particular Oyster shell has no predictable pattern on the surface. Like all Oakwood Jewelry it highly polished Sterling Silver providing reflectivity many angles. It can be used as part of a set with the Large Oyster silver pendant. It uniqueness make it fun to wear and a conversation piece.