Fluorite Sphalerite or the formation of equally

or the formation of equally thin layers of secondary minerals due to hydrothermal or other alteration

in iron smelting and other metallurgy

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

Barite is a mineral with an interesting history

Discovered - 1911

Fluorite Sphalerite or the formation of equallyFluorite 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