mineral
Quartz pebble
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, typically translucent to transparent, vitreous luster, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, typically translucent to transparent, vitreous luster, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65.
Formation & geological history
Formed through crystallization from silica-rich solutions or cooling magma; often weathered out of pegmatites, metamorphic, or igneous rocks and subsequently rounded into pebbles via water transport in streams or beaches.
Uses & applications
Used in landscaping, decorative gravel, tumbling, lapidary arts, and as a durable mineral specimen.
Geological facts
Quartz is one of the most abundant and durable minerals in Earth's continental crust, surviving weathering and erosion longer than almost any other mineral.
Field identification & locations
Identified by its high hardness (scratches glass), lack of cleavage, and glassy luster. Commonly found in riverbeds, beaches, and glacial outwash.
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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
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
Septarian Pebble
Septarian nodule / Concretion
sedimentary