mineral
Polished clear quartz cabochon
Quartz (silicon dioxide, SiO₂)
AI-generated identification · may be incorrectHardness 7 Mohs; transparent to pale smoky color, vitreous luster, trigonal crystal structure, and no true cleavage. The rounded cabochon shows internal fractures or inclusions.
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Physical properties
Hardness 7 Mohs; transparent to pale smoky color, vitreous luster, trigonal crystal structure, and no true cleavage. The rounded cabochon shows internal fractures or inclusions.
Formation & geological history
Quartz forms in igneous and metamorphic rocks and in hydrothermal veins; its geological age varies widely. The specimen has been cut and polished from natural quartz.
Uses & applications
Used in jewelry and mineral collections; quartz is also important in glassmaking, electronics, and abrasives.
Geological facts
Quartz is one of Earth’s most abundant minerals and commonly forms six-sided crystals, though this piece has been shaped.
Field identification & locations
Identify quartz by its glassy luster, hardness (it can scratch glass), and lack of cleavage. Found worldwide, including Brazil, Madagascar, and the United States.
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