mineral
Quartz River Rock
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, translucent to transparent, vitreous luster, conchoidal fracture, hexagonal crystal system when formed with faces.
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Physical properties
Hardness of 7 on the Mohs scale, translucent to transparent, vitreous luster, conchoidal fracture, hexagonal crystal system when formed with faces.
Formation & geological history
Formed via hydrothermal veins or crystallization in igneous, metamorphic, and sedimentary rocks, subsequently weathered and water-worn in a river or stream environment.
Uses & applications
Used in landscaping, decorative ground cover, glassmaking, electronics, and lapidary work.
Geological facts
Quartz is one of the most abundant and durable minerals in Earth's continental crust, highly resistant to both chemical and mechanical weathering.
Field identification & locations
Easily identified by its high hardness (scratches glass) and conchoidal fracture. Commonly found in riverbeds, glacial tills, and 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
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