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Fluorite dates back at least to the 1500s and has many industrial uses
Combination of red agate
Calcite is the principal constituent of limestone and marble
Office shelf Earth tone
Although they can form in all types of host rock
Sphalerite Spheres mother of thousands Fluorite dates back at leastSphalerite is a zinc sulfide mineral with a chemical composition of (Zn,Fe)S. It is found in metamorphic, igneous, and sedimentary rocks in many parts of the world. Sphalerite is the most commonly encountered zinc mineral and the world's most important ore of zinc. Uses: The primary ore of zinc. Often mined for minor amounts of indium, cadmium, g.. Chemical Composition: Zinc sulfide with variable amounts of iron, (Zn,Fe) Chemical Classification: