mineral
Quartz pebble
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, white to clear color, vitreous luster, trigonal crystal system, conchoidal fracture with no true cleavage.
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Physical properties
Hardness of 7 on the Mohs scale, white to clear color, vitreous luster, trigonal crystal system, conchoidal fracture with no true cleavage.
Formation & geological history
Formed via the precipitation of silica-rich solutions or as residual grains weathered from igneous and metamorphic rocks.
Uses & applications
Used in glass manufacturing, electronics, abrasives, and as a decorative landscaping stone or tumbled gemstone.
Geological facts
Quartz is one of the most abundant and durable minerals in the Earth's continental crust, highly resistant to chemical and physical weathering.
Field identification & locations
Found globally in riverbeds, beaches, and soil; identified by its high hardness, conchoidal fracture, and lack of reactivity to acid.
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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