Fluorite Calcite but most specimens have vivid

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

A widespread and industrially important mineral

Malachite has been mined for both use in copper tools and for ornamentation and jewelry

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

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

Fluorite Calcite but most specimens have vividFluorite 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