Marble

Unusual among handmade marbles, sulphides have a clear glass body in which floats (most commonly) a white figure made of sulphide salts. Some sulphides with a distinct layer of air surrounding the figure give a silvery appearance. Marble makers embedded a variety of figures in sulphides. Figures of animals, especially domestic ones, seem most common. But sulphides also depicted inanimate objects such as trains, cannons, watches, numbers, and among the rarest sulphides, religious symbols and persons.