mineral
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, white to translucent or brownish color, vitreous luster, hexagonal crystal system, no cleavage, specific gravity of 2.65
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Physical properties
Hardness of 7 on the Mohs scale, white to translucent or brownish color, vitreous luster, hexagonal crystal system, no cleavage, specific gravity of 2.65
Formation & geological history
Formed through the crystallization of silica-rich solutions or cooling magma, subsequently weathered, transported, and rounded by water action in river or beach environments over millions of years
Uses & applications
Used in landscaping, decorative gravel, glassmaking, electronics, and as a pocket specimen for rock collectors
Geological facts
Quartz is one of the most abundant and durable minerals in the Earth's continental crust, able to withstand prolonged weathering that destroys most other minerals
Field identification & locations
Easily identified by its high hardness (scratches glass), lack of cleavage, and resistance to weathering; commonly found in riverbeds, beaches, and gravel deposits 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
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