Leland Blue is a glass slag from the pig iron factories in Leland, Michigan. Jewelers use it for jewelry! This pair of Leland Blue happen to be cut into pear shapes and set into sterling silver with a post at the top. These are a post, dangle, drop style earring. It varies in the colors of blue, purple, black and turquoise. Over all size is about 1/2″ x1 1/2″.