mineral
Milky quartz (likely)
Quartz, silicon dioxide (SiO₂)
AI-generated identification · may be incorrectWhite to translucent, vitreous luster, irregular fracture and no visible cleavage; Mohs hardness 7, trigonal crystal structure. The specimen appears to be a small rough fragment; identification from the image is tentative.
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Physical properties
White to translucent, vitreous luster, irregular fracture and no visible cleavage; Mohs hardness 7, trigonal crystal structure. The specimen appears to be a small rough fragment; identification from the image is tentative.
Formation & geological history
Quartz forms when silica-rich fluids crystallize in veins and cavities, or during igneous and metamorphic processes. It is widespread in rocks of many geological ages.
Uses & applications
Quartz is used in glassmaking, electronics, abrasives, and as decorative or collectible material; attractive pieces may be used in jewelry.
Geological facts
Quartz is one of Earth’s most abundant minerals and commonly occurs in granite, pegmatite, and hydrothermal veins.
Field identification & locations
Look for glassy luster, hardness sufficient to scratch glass, and absence of cleavage; it occurs worldwide. The small white fragment could also be another pale mineral, so a hardness test would help confirm it.
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Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
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
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous