mineral
Clear quartz crystal
Quartz (silicon dioxide, SiO₂)
AI-generated identification · may be incorrectMohs hardness 7; colorless to translucent with a vitreous luster and hexagonal crystal structure. The elongated, prismatic form and apparent lengthwise striations are consistent with quartz; cleavage is absent, with conchoidal fracture.
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Physical properties
Mohs hardness 7; colorless to translucent with a vitreous luster and hexagonal crystal structure. The elongated, prismatic form and apparent lengthwise striations are consistent with quartz; cleavage is absent, with conchoidal fracture.
Formation & geological history
Forms when silica-rich fluids or melts crystallize in igneous and hydrothermal settings. Quartz is found in rocks of many geological ages.
Uses & applications
Used in jewelry and mineral collections; quartz is also important in glassmaking, electronics, and industrial abrasives.
Geological facts
Quartz is among Earth’s most abundant minerals and commonly forms six-sided prisms terminated by pyramidal faces.
Field identification & locations
Look for glassy translucence, hardness sufficient to scratch glass, and no cleavage; quartz occurs worldwide in veins, pegmatites, and sedimentary rocks. The image supports a quartz identification, though exact identification from appearance alone is uncertain.
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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