Fluorite Mixed on Matrix Minerals and Gems and as a precious metal

and as a precious metal for thousands of years

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

are found in a matrix of thick

and blues as well as the more commonly encountered clear or pale white

but most specimens have vivid color due to various impurities and are often fluorescent

Fluorite Mixed on Matrix Minerals and Gems and as a precious metalFluorite 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