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Feldspar

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Mineral Lab: Plagioclase Feldspar

3:17

Mineral Lab: Potassium Feldspar

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BIG feldspar CRYSTALS right by the road in Ontario

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Feldspar - The Rest

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Potassium feldspar (orthoclase)

Feldspars (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8) are a group of rock-forming tectosilicate minerals that make up about 41% of the Earth's continental crust by weight.
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    • Compositions 

    • Etymology 

    • Weathering 

    • Production and uses