mineral
Quartz pebble / River stone
SiO2 (Silicon Dioxide)
AI-generated identification · may be incorrectHardness: 7, Color: white to milky, Luster: vitreous to dull if weathered, Crystal structure: trigonal (though massive here), Cleavage: none, Specific gravity: 2.65
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Physical properties
Hardness: 7, Color: white to milky, Luster: vitreous to dull if weathered, Crystal structure: trigonal (though massive here), Cleavage: none, Specific gravity: 2.65
Formation & geological history
Formed from igneous or metamorphic processes, subsequently weathered, transported by water, and smoothed into a pebble over time.
Uses & applications
Landscaping, decorative stone, sometimes used in aggregate or as an abrasive.
Geological facts
Quartz is one of the most abundant minerals on Earth's surface. The smooth shape indicates significant transport by water, such as a river or wave action.
Field identification & locations
Identify by its hardness (scratches glass), lack of cleavage, and typical milky white color. Found commonly in riverbeds, beaches, and glacial deposits.
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Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
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