Stone part: Approximately 2.5cm long I have kept this in an accessory case for many years without ever using it. Since it has been stored at home, I have listed it as "Like New." * Please understand that there may be some dullness on the metal fittings before purchasing. * As this is a natural stone, there may be color variations. I do not know the name of the stone. * I have a cat. If you are concerned about this or have allergies, please refrain from purchasing. Thank you very much. #NaturalStone #NaturalStonePendantTop #ShowaRetro