Fluorite

FluoriteFluorite is one of the most variable of all crystalline minerals, occurring in shades of blue, green, purple, red and many other colors corresponding to their physical makeup and conditions when the mineral was formed. The name fluorite comes from its use as a flux, or chemical cleaning agent, in iron smelting and other metallurgy. Pure fluorite is clear, but most specimens have vivid color due to various impurities and are often fluorescent. With a

vast shoals of freshwater fish inhabited a large shallow inland sea across the American West

The herring-like fish of the genus Knightia were far and away the most abundant freshwater fish during this era

occurring in shades of blue

Beautifully preserved on slabs of flat shale

Originating from the famed Green River Formation in Wyoming

botryoidal crystal formations

Each contains at least one (most several) clearly visible insect

A silicone-based mineral closely related to quartz and agate

its color formed from the oxidation of copper and it is typically found in spherical (botryoidal) or rounded formations

These carefully cut spheres show off the beautiful and varied hues of natural aquamarine

These unique

These incredible specimens of natural uncut aquamarine from Mount Little Xuebaoding in Sichuan