mineral
Likely milky quartz fragment
Quartz (silicon dioxide, SiO₂)
AI-generated identification · may be incorrectThe specimen appears pale, opaque, and roughly broken; its surface and lighting make luster and crystal form unclear. Quartz has Mohs hardness 7, a trigonal crystal structure, vitreous luster, and no cleavage.
Identified More mineral →
Explore Likely milky quartz fragment in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
The specimen appears pale, opaque, and roughly broken; its surface and lighting make luster and crystal form unclear. Quartz has Mohs hardness 7, a trigonal crystal structure, vitreous luster, and no cleavage.
Formation & geological history
Quartz commonly forms as veins in igneous and metamorphic rocks or crystallizes from silica-rich fluids; its age depends on its host geology.
Uses & applications
Quartz is used in glassmaking, electronics, construction aggregate, and decorative objects; attractive pieces may be collected or polished.
Geological facts
Quartz is one of Earth’s most abundant minerals and commonly occurs as milky, translucent masses.
Field identification & locations
A hardness test (scratching glass) and lack of cleavage can help identify quartz, but this image alone is insufficient for confident identification. Quartz occurs worldwide in veins, pegmatites, and many rock types.
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