Fluorite Goethite silky and lustrous texture of

silky and lustrous texture of these fibrous Malachite specimens combined with the incredibly rich color make them deservedly popular among collectors

Like the trees they capture the form of

Pyrite formations tend to be shiny and metallic

The herring-like fish of the genus Knightia were far and away the most abundant freshwater fish during this era

depending on the presence of minerals like manganese or iron during the formation of the crystals

Fluorite Goethite silky and lustrous texture ofFluorite 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