mineral
Quartz pebble
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, vitreous luster, conchoidal fracture, and typically clear, white, or light brownish in color.
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Physical properties
Hardness of 7 on the Mohs scale, vitreous luster, conchoidal fracture, and typically clear, white, or light brownish in color.
Formation & geological history
Formed through the accumulation and physical weathering of resistant quartz grains transported by water or wind over millions of years.
Uses & applications
Used in landscaping, decorative gravel, abrasive manufacture, and as collector specimens.
Geological facts
Quartz is one of the most abundant and durable minerals in Earth's continental crust, surviving weathering that destroys other minerals.
Field identification & locations
Easily identified by its high hardness (scratches glass) and lack of cleavage; commonly found in riverbeds, beaches, and sedimentary conglomerates worldwide.
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Other mineral specimens
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
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic