I love Marcasite jewelry but always thought it was made with the gemstone Marcasite. Wrong. Marcasite is made from tiny pieces of Pyrite set into metal. It looks like little pieces of silver set against a black background. Marcasite has always been a little pricey and now I understand why. Anytime you have to set such tiny stones into metal, it is time consuming and costly. Still, Marcasite jewelry is super and well worth the cost, depending upon the piece.