mineral
Milky quartz
Quartz (silicon dioxide, SiO₂)
AI-generated identification · may be incorrectHardness 7 on the Mohs scale; white to cream, translucent in places, with a vitreous-to-waxy luster and irregular fracture. Quartz has a trigonal crystal structure but this specimen shows no distinct crystal faces.
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Physical properties
Hardness 7 on the Mohs scale; white to cream, translucent in places, with a vitreous-to-waxy luster and irregular fracture. Quartz has a trigonal crystal structure but this specimen shows no distinct crystal faces.
Formation & geological history
Forms when silica-rich fluids crystallize in veins and fractures, or as a component of igneous and metamorphic rocks. Quartz is widespread across geologic ages; the specimen’s age and exact origin cannot be determined from the image.
Uses & applications
Used in glassmaking, abrasives, engineered stone, and decorative objects; attractive pieces may be collected or polished.
Geological facts
The cloudy appearance commonly results from microscopic fluid or gas inclusions and internal fractures.
Field identification & locations
Likely quartz based on its pale color, glassy translucence, and massive form; confirm with a glass scratch test, since quartz can scratch glass. Common in quartz veins and many rock types worldwide.
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