mineral

Milky quartz

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Typically white to gray and translucent, with a vitreous-to-greasy luster and no cleavage; Mohs hardness 7, hexagonal crystal structure, specific gravity about 2.65. The image appears to show a rough, massive specimen.

Identified October 5, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich fluids crystallize in veins or cavities, and also occurs in many igneous and metamorphic rocks. Quartz is widespread across Earth’s crust; the specimen’s age and exact origin cannot be determined from the image.

Uses & applications

Used as a silica source in glassmaking and other industries; attractive pieces are collected or carved, though this specimen does not appear gem quality.

Geological facts

Its cloudy appearance comes from microscopic fluid inclusions, fractures, or other impurities within otherwise clear quartz.

Field identification & locations

Look for hardness sufficient to scratch glass, lack of cleavage, and conchoidal fracture; common in quartz veins worldwide. Estimated value: about $1–$15 for a common rough specimen of this size.