Pyrite Cube from Spain
You will be picked one at random from the photo
Mineral class- sulfide
Crystal system-Isometric/cubic
Common forms-sharp cubes, pyrithoedrons (12 sided faces) and octahedrons.
Rock formation inside volcanic:
Sedimentary rocks-forms in organic rich shales,limestone and coal beds via bacterial sulfate reduction in low oxygen marine environments.
Igneous rock- Occurs as a primary accessory mineral or separates from cooling magma.
Metamorphic rocks- created through regional or contact metamorphism altering pre existing iron bearing minerals.
Hydrothermal veins- precipitates out from hot metal rich underground fluids cooling in rock fractures.
