mineral
Milky quartz
Quartz, silicon dioxide (SiO₂)
AI-generated identification · may be incorrectHardness 7 Mohs; white to translucent, glassy-to-greasy luster, and a trigonal crystal structure. The rough, irregular piece shows no obvious cleavage and likely has conchoidal fracture.
Identified More mineral →
Explore Milky quartz in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness 7 Mohs; white to translucent, glassy-to-greasy luster, and a trigonal crystal structure. The rough, irregular piece shows no obvious cleavage and likely has conchoidal fracture.
Formation & geological history
Forms when silica-rich fluids crystallize in veins and cavities, or during cooling of silica-rich magma; quartz occurs in rocks of many geological ages.
Uses & applications
Commonly used for decorative objects, carving, jewelry, and as a source of silica for glass and industrial materials.
Geological facts
Its cloudy appearance comes from microscopic fluid or gas inclusions and internal fractures that scatter light.
Field identification & locations
Look for hardness, glassy luster, and lack of cleavage; quartz is widespread in veins and many igneous, metamorphic, and sedimentary rocks worldwide. The photo alone cannot establish a precise variety.
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
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
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