Marcasite Nodules, Natural Mineral Specimens

Round Marcasite Nodules

Marcasite is an iron sulfide mineral just like iron pyrite, but it has a very different crystalline structure. Where pyrite forms in cubic crystals, marcasite forms in rectangular prisms and is more fragile than pyrite. Despite these differences, marcasite can sometimes be called white iron pyrite.

Items vary in size, shape, and color when selected randomly (the highest quality items are chosen first). They'll be as beautiful as those in the photos.