Cubular Pyrite Specimen (5” x 4” x 2.5”) Prong Set is a manganese calcium carbonate

is a manganese calcium carbonate mineral and member of the Calcite family

Arsenopyrite with Calcite specimen has lustrous Arsenopyrite crystals that protrude from the matrix rock

gray or brown and has a hardness of 3

This phenomenally green specimen of Malachite is a treat to have and hold

Cubular Pyrite Specimen (5” x 4” x 2.5”) Prong Set is a manganese calcium carbonateThis Cubular Pyrite Specimen displays a shiny cubic formation throughout. Has small brassy yellow chalcopyrite crystals on its surface as well as an attractive sparkly dusting of a blackish metallic mineral. From Peru. The mineral pyrite, or iron pyrite, also known as fool's gold, is an iron sulfide. Pyrite is considered the most common of the sulfide minerals and is rated between 6 and 6. 5 on the Mohs hardness scale. Pyrite's metallic luster and