mineral
Quartz-rich pebble (likely milky quartz)
Quartz, SiO₂
AI-generated identification · may be incorrectSmall, rough, pale gray-white specimen with a dull to slightly glassy luster; quartz has Mohs hardness 7, a trigonal crystal structure, and no cleavage, breaking with curved or irregular fractures. The image is blurry, so exact identification is uncertain.
Identified More mineral →
Explore Quartz-rich pebble (likely milky quartz) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Small, rough, pale gray-white specimen with a dull to slightly glassy luster; quartz has Mohs hardness 7, a trigonal crystal structure, and no cleavage, breaking with curved or irregular fractures. The image is blurry, so exact identification is uncertain.
Formation & geological history
Quartz forms in many igneous, metamorphic, and sedimentary settings, including veins and weathered gravels; its age cannot be determined from the image.
Uses & applications
Quartz is used in glass, electronics, construction aggregate, and jewelry; this small uncut piece is mainly suitable for collecting.
Geological facts
Quartz is one of Earth’s most abundant minerals and resists weathering, allowing it to accumulate in river and beach gravels.
Field identification & locations
A hard, scratch-resistant pebble with no obvious cleavage is consistent with quartz; common worldwide in veins, rocks, and sediments. The specimen’s exact composition cannot be confirmed visually.
More like this
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