mineral
Milky quartz (likely quartz-bearing fragment)
Quartz, silicon dioxide (SiO₂)
AI-generated identification · may be incorrectTypically white to translucent with a vitreous luster; hardness 7 Mohs, no cleavage, conchoidal fracture, and hexagonal crystal structure. The specimen appears granular and may contain minor feldspar or weathering coatings.
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Physical properties
Typically white to translucent with a vitreous luster; hardness 7 Mohs, no cleavage, conchoidal fracture, and hexagonal crystal structure. The specimen appears granular and may contain minor feldspar or weathering coatings.
Formation & geological history
Forms in igneous, metamorphic, and hydrothermal environments when silica-rich fluids or melts crystallize. Quartz is geologically ancient and occurs from Archean rocks to modern veins and sediments.
Uses & applications
Used in glass, ceramics, electronics, abrasives, and engineered stone; attractive clear or unusual pieces are collected, though this fragment has little jewelry value.
Geological facts
Quartz is one of Earth’s most abundant minerals and is piezoelectric, generating an electrical charge under pressure.
Field identification & locations
Identify by its hardness, glassy luster, lack of cleavage, and ability to scratch ordinary glass; common sources include granite, pegmatites, quartz veins, and river gravels worldwide.
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