mineral
Quartz pebble
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectMohs hardness of 7, white to clear color, vitreous luster, trigonal crystal system, conchoidal fracture, and specific gravity of 2.65.
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Physical properties
Mohs hardness of 7, white to clear color, vitreous luster, trigonal crystal system, conchoidal fracture, and specific gravity of 2.65.
Formation & geological history
Formed through crystallization in igneous, metamorphic, and sedimentary environments, often rounded into pebbles by water transport in rivers or beaches.
Uses & applications
Used in landscaping, decorative gravel, glassmaking, electronics, and lapidary work.
Geological facts
Quartz is one of the most abundant minerals in the Earth's continental crust and exhibits piezoelectric properties.
Field identification & locations
Easily identified by its high hardness (scratches glass) and lack of cleavage, commonly found in riverbeds and coastal beaches worldwide.
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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
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Granite
Granite (Phaneritic intrusive igneous rock)
igneous