mineral
Small translucent quartz fragment
Quartz (SiO₂), identification tentative from the image
AI-generated identification · may be incorrectA small, pale gray-white translucent piece with a vitreous-to-dull luster and irregular fracture; quartz has Mohs hardness 7, a trigonal crystal structure, and no cleavage. The photo does not show diagnostic crystal faces clearly.
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Physical properties
A small, pale gray-white translucent piece with a vitreous-to-dull luster and irregular fracture; quartz has Mohs hardness 7, a trigonal crystal structure, and no cleavage. The photo does not show diagnostic crystal faces clearly.
Formation & geological history
Quartz commonly forms when silica-rich fluids crystallize in veins or cavities, and also occurs in igneous, metamorphic, and sedimentary rocks; its age cannot be determined from appearance alone.
Uses & applications
Quartz is used in glass and electronics, and clear or well-formed specimens may be collected or used as gemstones.
Geological facts
Quartz is one of Earth’s most abundant minerals and its hardness lets it scratch ordinary glass.
Field identification & locations
Check for glass-scratching hardness and lack of cleavage; similar pale fragments can be calcite, feldspar, or other minerals, so a close-up or simple tests would improve identification. Quartz occurs worldwide in veins, pegmatites, and many common rocks.
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