Peridot green crystals in basalt

Olivine variety Peridot

peridot birthstone

peridot birthstone labeled

Gahnite crystals may be green blue yellow brown or grey

Mesolite acicular crystals in a radial cluster on Stilbite

Borax crystals

Pyrite crystals

Painite one of few known crystals

pyrite euhedral parabolic crystals

Metacinnabar crust of small black crystals

Mosandrite crystals in Aegirine

Grossular orange Grossular garnet crystals

Amazonite crystals

Luzonite intergrown crystals

Zincite synthetic crystals

Halite intergrown hopper crystals

Autunite crystals

Marcasite cluster of Cockscomb crystals

Monticellite brown crystals in Calcite

Stibnite cluster of prismatic crystals

Manganite dark mineral crystals

Conichalcite w some calcite crystals

Pyrolusite vein of prismatic crystals