mineral
Milky quartz
Quartz (SiO₂), commonly called milky quartz
AI-generated identification · may be incorrectWhite, translucent to opaque fragment with a vitreous-to-waxy luster; Mohs hardness 7, trigonal crystal structure, and no cleavage, breaking with uneven or conchoidal fracture. The fragment appears roughly centimeter-scale beside the coin.
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
White, translucent to opaque fragment with a vitreous-to-waxy luster; Mohs hardness 7, trigonal crystal structure, and no cleavage, breaking with uneven or conchoidal fracture. The fragment appears roughly centimeter-scale beside the coin.
Formation & geological history
Forms when silica-rich fluids crystallize in veins or cavities, or as part of igneous and metamorphic rocks. Quartz is widespread across Earth’s crust and occurs in rocks of many geological ages.
Uses & applications
Used as a silica source in glassmaking and industrial materials; attractive pieces are collected or used in decorative stonework and jewelry.
Geological facts
Its cloudy appearance results from microscopic fluid inclusions or defects that scatter light.
Field identification & locations
Likely identification is milky quartz, but a photograph cannot confirm composition. Look for glassy surfaces, hardness sufficient to scratch glass, and lack of cleavage; common worldwide, especially in quartz veins.
