mineral
Clear Quartz
Silicon Dioxide (SiO2)
Hardness: 7 (Mohs scale), Color: Colorless/Transparent, Luster: Vitreous, Crystal structure: Hexagonal/Trigonal, Cleavage: None/Conchoidal fracture, Specific gravity: 2.65
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Physical properties
Hardness: 7 (Mohs scale), Color: Colorless/Transparent, Luster: Vitreous, Crystal structure: Hexagonal/Trigonal, Cleavage: None/Conchoidal fracture, Specific gravity: 2.65
Formation & geological history
Formed at all temperatures from igneous magmas, hydrothermal veins, and metamorphic cycles throughout geological history. It crystallizes from silica-rich solutions in caves, cracks, and pockets.
Uses & applications
Extensively used in electronics for its piezoelectric properties, glass manufacturing, precision optics, jewelry, and as a popular collector's gemstone.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. It was historically used to make stone tools and has been revered in many cultures for spiritual purposes.
Field identification & locations
Identify by its hardness (scratches glass), lack of cleavage, and characteristic hexagonal crystal points. Found worldwide in massive variety and well-formed crystals.
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Mineral/Rock
Banded Gneiss (River Rock/Pebble)
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Green Apatite on Albite
Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]
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Epidote
Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)
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