mineral
Quartz Pebble
Silicon Dioxide (SiO2)
Hardness: 7 (Mohs), Color: Off-white/cloudy with tan inclusions, Luster: Vitreous to greasy (when weathered), Crystal System: Hexagonal (trigonal), Cleavage: None/Conchoidal fracture.
Identified More mineral →
Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 7 (Mohs), Color: Off-white/cloudy with tan inclusions, Luster: Vitreous to greasy (when weathered), Crystal System: Hexagonal (trigonal), Cleavage: None/Conchoidal fracture.
Formation & geological history
Formed via hydrothermal activity or crystallization from cooling magma. This specific specimen is a water-worn or weathered pebble likely eroded from a larger quartz vein and transported by fluvial processes.
Uses & applications
Industrial use in glassmaking, electronics (piezoelectric properties), abrasives, and as a common decorative landscape stone.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Pure quartz is clear, but tiny inclusions of air or fluid create the 'milky' appearance seen in this pebble.
Field identification & locations
Identify by its inability to be scratched by a steel knife (hardness) and the lack of cleavage. Commonly found in riverbeds, glacial deposits, and mountain ranges globally.
More like this
Other mineral specimens
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Schist
Schist
Metamorphic
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Nephrite Jade
Nephrite
Mineral/Rock
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety often found as a river rock)
Metamorphic Rock
![Green Apatite on Albite (Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]) — mineral](https://media.rockidentification.com/2391a63f-fb20-47d5-af9a-2035851eb32e-thumbnail.jpg)
Green Apatite on Albite
Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]
mineral