mineral
Milky quartz pebble
Quartz (silicon dioxide, SiO₂)
AI-generated identification · may be incorrectWhite to pale pink, opaque and slightly translucent, with a glassy to dull luster and massive texture; Mohs hardness 7, no cleavage, and conchoidal fracture. The photo shows a rounded, weathered specimen; its exact identity cannot be confirmed from appearance alone.
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Physical properties
White to pale pink, opaque and slightly translucent, with a glassy to dull luster and massive texture; Mohs hardness 7, no cleavage, and conchoidal fracture. The photo shows a rounded, weathered specimen; its exact identity cannot be confirmed from appearance alone.
Formation & geological history
Quartz commonly crystallizes from silica-rich fluids in veins and igneous or metamorphic rocks, then persists as pebbles after weathering and transport. Quartz formed throughout geologic time.
Uses & applications
Used in glassmaking, electronics, and construction; attractive pieces may be kept as inexpensive collectibles or polished for decoration.
Geological facts
Quartz is among Earth’s most abundant minerals and resists weathering, so it often accumulates in river and beach gravels.
Field identification & locations
Look for hardness—quartz can scratch glass—and the absence of cleavage; milky quartz is common worldwide in veins and stream gravels. The rounded shape suggests transport or handling, but does not establish its source.
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