mineral
Quartz pebble
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness 7, whitish/yellowish color, waxy to vitreous luster, conchoidal fracture. Often smoothed by water action.
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Physical properties
Hardness 7, whitish/yellowish color, waxy to vitreous luster, conchoidal fracture. Often smoothed by water action.
Formation & geological history
Formed in igneous, metamorphic, or sedimentary rocks, then weathered and transported by water, becoming rounded.
Uses & applications
Used in landscaping, construction, and sometimes tumbled for jewelry or collecting.
Geological facts
Quartz is one of the most abundant minerals in the Earth's continental crust.
Field identification & locations
Identify by its hardness (scratches glass) and lack of cleavage. Commonly found in riverbeds and beaches.
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Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Limonite
FeO(OH)•nH2O
mineral
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
Feldspar
Feldspar Group (Tectosilicate, e.g., KAlSi3O8)
mineral
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous