mineral
Quartz Crystal Matrix
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale. Colors vary from colorless to white, gray, or brown in matrix forms. Luster is vitreous to dull on the rock surface. Crystal system is trigonal.
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Physical properties
Hardness of 7 on the Mohs scale. Colors vary from colorless to white, gray, or brown in matrix forms. Luster is vitreous to dull on the rock surface. Crystal system is trigonal.
Formation & geological history
Formed in hydrothermal veins and pegmatites through the cooling and precipitation of silica-rich solutions over millions of years.
Uses & applications
Used in mineral collections, decorative items, and occasionally lapidary work.
Geological facts
Quartz is one of the most abundant minerals in the Earth's continental crust and exhibits piezoelectric properties.
Field identification & locations
Can be identified by its high hardness (scratches glass) and conchoidal fracture. Found worldwide in nearly all geological environments.
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Septarian Pebble
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Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
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Schist
Schist
Metamorphic