What mineral group does marcasite belong to?

Physical Properties of Marcasite
Chemical Classification Sulfide
Chemical Composition Iron sulfide, FeS2
Crystal System Orthorhombic
Uses A historical source of sulfur. Some gemstones and jewelry items are reported to be made of marcasite, but most of these are actually pyrite or made from a metal with a similar appearance.

Is marcasite the same as pyrite?

Pyrite and marcasite are two forms of iron disulfide minerals. The key difference between pyrite and marcasite is that pyrite has an isometric crystal system, whereas marcasite has an orthorhombic crystal system.

What is the formula for marcasite?


Formula (repeating unit) FeS2
IMA symbol Mrc
Strunz classification 2.EB.10a
Crystal system Orthorhombic

Is marcasite fool’s gold?

Marcasite is a gemstone that has a rich history, and has been a jewellery staple for centuries. What we know as Marcasite jewelry is actually made from `iron pyrite’ – commonly known as `fool’s gold’.

What is marcasite made of?

Marcasite jewellery is jewellery made using cut and polished pieces of pyrite (fool’s gold) as gemstone, and not, as the name suggests, from marcasite (sometimes misspelled Mercasite).

What is a marcasite stone?

Marcasite jewelry is any jewelry piece made out of the brittle, brassy colored metallic stone called pyrite, a.k.a Fool’s Gold (more on this confusion between marcasite and pyrite below). Marcasite itself is a granular stone with relatively low hardness (6 to 6.5 on the Mohs scale) and a very distinct cleavage.

What mineral group is Beryl in?

Beryl is hexagonal; space group P6/mcc, point group 6/m 2/m 2/m; a = 9.205-9.274 Å, c = 9.187-9.249 Å.

Is marcasite a crystal?

Marcasite is iron sulfide with an orthorhombic crystal structure. It is not uncommon for marcasite to be confused for pyrite.