mineral
Rounded quartz-rich beach pebble
Likely milky quartz or quartzite (SiO₂)
AI-generated identification · may be incorrectWhite to pale gray, opaque, dull-to-glassy luster, fine-grained and water-rounded; quartz hardness is Mohs 7, with no cleavage and conchoidal fracture. The image is somewhat blurred, so exact identification is uncertain.
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Physical properties
White to pale gray, opaque, dull-to-glassy luster, fine-grained and water-rounded; quartz hardness is Mohs 7, with no cleavage and conchoidal fracture. The image is somewhat blurred, so exact identification is uncertain.
Formation & geological history
Likely weathered from quartz-bearing igneous or metamorphic bedrock, then transported and polished by waves or stream action. Quartz formed in various geological settings from Precambrian to modern ages.
Uses & applications
Commonly collected as a beach stone, landscaping aggregate, or craft material; attractive pieces may be polished, but this specimen has little commercial value.
Geological facts
Quartz is one of Earth’s most abundant minerals and strongly resists weathering, allowing it to accumulate in beaches and gravel bars.
Field identification & locations
Test with a steel file or glass: genuine quartz should scratch glass; it commonly appears alongside dark minerals and feldspar in beach sediment. Common worldwide, especially on quartz-rich coasts and rivers.
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Epidote
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Pegmatite with Tourmaline and Quartz
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Granite
Granite (Phaneritic intrusive igneous rock)
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Septarian Pebble
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