mineral
Milky quartz fragment
Quartz (SiO₂)
AI-generated identification · may be incorrectPale translucent white to cream, vitreous to slightly dull luster, and irregular fracture; hardness 7 Mohs, trigonal crystal structure, with no cleavage. The small rough fragment’s identity is suggestive rather than certain from the image alone.
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Physical properties
Pale translucent white to cream, vitreous to slightly dull luster, and irregular fracture; hardness 7 Mohs, trigonal crystal structure, with no cleavage. The small rough fragment’s identity is suggestive rather than certain from the image alone.
Formation & geological history
Quartz commonly crystallizes from silica-rich fluids in veins and igneous or metamorphic rocks; it forms across many geologic ages and settings.
Uses & applications
Quartz is used in glassmaking, electronics, abrasives, and decorative objects; this small rough piece has little jewelry value unless suitable for cutting.
Geological facts
Quartz is one of Earth’s most abundant minerals and resists weathering, so it commonly persists in sediments and soils.
Field identification & locations
Look for glassy luster, hardness sufficient to scratch glass, and absence of cleavage; common worldwide in veins, granites, and metamorphic rocks.
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Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
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Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
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Granite
Granite (Phaneritic intrusive igneous rock)
igneous