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Main Crystal and Metal Groups

Main Crystal and Metal Groups

Crystals and metals are classified based on their chemical composition and placed into one of the main groups listed below.   Main Groups of Crystals and Metals Oxides Native Elements Sulfides Silicates Mineraloids Organic Minerals   The Oxide Mineral Class...
Hardness of Minerals

Hardness of Minerals

Hardness (H) of minerals is identified with the Mohs scale of hardness. Created by a German mineralogist named Friedrich Mohs in 1812, the Mohs scale places minerals in a degree of hardness based on the difficulty of which the mineral can be scratched by another...