Green Clear Fluorite Tanzanite The spectacular display of colors

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

sometimes in the same formations

and under optimal conditions these insects will be clearly visible within the fossilized amber pieces

Species - Scyphocrinites elegans

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

Green Clear Fluorite Tanzanite The spectacular display of colorsFluorite 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