Pagoda Calcite w/ Rainbow Pyrite Sphalerite Amethyst is a form of

Amethyst is a form of Quartz which gets its beautiful purple tint from the substitution of silicone for iron due to irradiation

The spectacular display of colors these specimens display can be formed by two different geological processes: the oxidation of pyrite causing ultra-thin layers of iron oxide to form on the surface

It rarely occurs in crystal form but is often found in botryoidal or fibrous formations

red and many other colors corresponding to their physical makeup and conditions when the mineral was formed

Metacanthian Trilibite from the Mid Devonian Period

Pagoda Calcite w/ Rainbow Pyrite Sphalerite Amethyst is a form of