Spence's Metal

Spence's Metal is made by melting together a metallic sulphide, such as sulphide of iron (iron pyrites), along with sulphur. The result is a grayish-black substance, without metallic lustre, which takes a good polish. It can be coloured to imitate bronze and other metals, and as it melts at 320° F. it can readily be cast into moulds from which it takes a sharp impression. Busts, medallions, &c. have been made of it, and it is also used like lead for the joints of pipes. It is but slightly acted on by acids. First made in 1879, it is more of the nature of a hard cement than a metal.