The mineral
marcasite, sometimes called white iron pyrite, is iron sulfide (FeS 2) with orthorhombic crystal structure . It is
Kaynak: MarcasiteMarcasite jewellery is jewellery made from pyrite (fool's gold), not, as the name suggests, from
marcasite . similar to
marcasite, but
Kaynak: Marcasite jewellery Pyrite is used to make
marcasite jewelry (incorrectly termed
marcasite ).
Marcasite jewelry, made from small faceted pieces of pyrite,
Kaynak: PyriteIt is a secondary sulfate mineral which forms from the oxidation of primary sulfide mineral s such as pyrite and
marcasite in the
Kaynak: MelanteriteFor example, pyrite and
marcasite , both iron sulfides, have the formula FeS 2; however, the former is isometric while the latter is
Kaynak: Minerallow humidity at less than 21 °C as an alteration of copper-free melanterite which is a post mine alteration product of pyrite or
marcasite .
Kaynak: RozenitePyrite disks or spindles are sometimes mistaken for fossils of sand dollar s or other forms (see
marcasite ). Cracks, bumps, gas
Kaynak: PseudofossilIt occurs in hydrothermal deposits associated with sphalerite , pyrite , chalcopyrite , barite and
marcasite . It also occurs in low-
Kaynak: WurtziteIt occurs in association with uraninite , thorite , pyrite ,
marcasite , roscoelite , clay mineral s and amorphous organic matter .
Kaynak: Coffiniteskutterudite , cobaltite, ullmannite, maucherite , löllingite , platinum-group minerals, millerite , pyrite ,
marcasite , and chalcopyrite .
Kaynak: GersdorffiteAssociated minerals include stibnite , realgar , orpiment , cinnabar , vrbaite , greigite ,
marcasite , pyrite , tetrahedrite , antimonian
Kaynak: LoranditeIt occurs with cylindrite, teallite , plagionite , zinkenite , cassiterite , wurtzite , pyrrhotite ,
marcasite , arsenopyrite , galena ,
Kaynak: FranckeiteIt forms in clay and lignite deposits as an oxidation product of pyrite and
marcasite along with aluminium silicates. It also occurs
Kaynak: AluminiteGreek for "other" and "to break," in reference to its distinct cleavage which distinguished it from the similar appearing mineral
marcasiteKaynak: AlloclasiteIt also occurs as an alteration in argillaceous sediments or coal beds which contain oxidizing sulfide mineral s (pyrite or
marcasiteKaynak: Alum-(K)