What is pyrite?

Pyrite is a very common mineral (also one of the most common natural sulfides, and the most common disulfide ), found in a wide variety of geological formations from sedimentary deposits to hydrothermal veins and as a constituent of metamorphic rocks.

What is isometric pyrite?

The isometric (cubic) polymorph of orthorhombic marcasite. Pyrite is a very common mineral (also one of the most common natural sulfides, and the most common disulfide ), found in a wide variety of geological formations from sedimentary deposits to hydrothermal veins and as a constituent of metamorphic rocks.

Is pyrite a polymorph of marcasite?

Pyrite Group. The isometric (cubic) polymorph of orthorhombic marcasite. Pyrite is a very common mineral, found in a wide variety of geological formations from sedimentary deposits to hydrothermal veins and as a constituent of metamorphic rocks.

What is iridescent pyrite?

– Iridescent Pyrite from the Volga River of Russia. Rainbow Pyrite is usually in spherical concretion s that contain internal shrinkage fractures, and the iridescence is caused by oxidation. Pyrite was once used as a source of sulfur, but is now only a minor ore for both sulfur and iron.