marcasite
n. 1 yellowish crystalline iron sulphide. 2 crystals of this used in jewellery. [arabic markashita]
n. A sulphide of iron resembling pyrite or common iron pyrites in composition, but differing in form; white iron pyrites.
n. 1 yellowish crystalline iron sulphide. 2 crystals of this used in jewellery. [arabic markashita]
n. A sulphide of iron resembling pyrite or common iron pyrites in composition, but differing in form; white iron pyrites.