What is Marcasite

The mineral in marcasite jewelry is not in fact marcasite but iron pyrite. Because of iron pyrite's resemblance to marcasite, jewelry from this mineral became known colloquially as marcasite jewelry. Iron pyrite has a bright sheen, a metallic finish, and a hardness that allows it to stand up well to scratches and dings over the years, and thus gives consumers the ability to find quality pieces in good condition years after their creation.