Fluorite Cubes on Matrix Tanzanite or the formation of equally

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

highly variable Chalcedony spheres are almost geode-like in appearance and one can clearly see the process of geode or agate formation in progress in each specimen

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

occurring in shades of blue

Colored fluorite clusters atop candle quartz bases are some of the most distinctive mineral specimens to originate from the mines of Inner Mongolia

Fluorite Cubes on Matrix Tanzanite 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