mineral
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectMohs hardness 7, translucent tan to brownish-grey color, vitreous to waxy luster, trigonal crystal system, conchoidal fracture with no cleavage, specific gravity ~2.65.
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Physical properties
Mohs hardness 7, translucent tan to brownish-grey color, vitreous to waxy luster, trigonal crystal system, conchoidal fracture with no cleavage, specific gravity ~2.65.
Formation & geological history
Formed via crystallization in igneous or hydrothermal environments, then weathered, transported, and rounded by fluvial or marine sedimentary processes.
Uses & applications
Used primarily in construction aggregates, landscaping, abrasives, or as tumbled decorative pocket stones.
Geological facts
Quartz is one of the most common and resistant minerals on Earth's crust, frequently comprising the majority of beach and river gravels.
Field identification & locations
Identified by its ability to scratch glass (hardness 7), lack of cleavage, and smooth rounded pebble morphology; ubiquitous along riverbeds and shores 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
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