large calcite crystals and the dusting of fine gold from the pyrite is unique to specimens from this specific region of China and have not been found anywhere else
Amethyst has been sought after since ancient times as a gemstone and decorative object
or the formation of equally thin layers of secondary minerals due to hydrothermal or other alteration
Azurite is a striking copper-based mineral found in shades of deep blue to vivid green
with color intensity usually deepest at the termination or tip of each crystal
Green Clear Fluorite Ammonite large calcite crystals and theFluorite 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