mineral

Milky quartz fragment

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

White to translucent, glassy-to-waxy luster with a granular, possibly weathered surface; hardness Mohs 7, no cleavage, conchoidal fracture, and hexagonal crystal structure. Specific gravity is about 2.65.

Identified August 15, 2026More mineral →

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Physical properties

Formation & geological history

Likely a naturally broken quartz vein or quartz-rich rock fragment formed from silica-rich hydrothermal fluids in fractures. Quartz veins range from Precambrian to recent in age and occur in many geological settings.

Uses & applications

Used for glass, ceramics, abrasives, foundry sand, and engineered stone; attractive pieces may be collected, though this fragment is not typically gem quality.

Geological facts

Milky quartz appears cloudy because microscopic fluid inclusions or structural defects scatter light. Its hardness allows it to scratch ordinary glass and steel.

Field identification & locations

Identify it by its white translucency, lack of cleavage, glassy fracture, and resistance to scratching; common worldwide, especially in vein outcrops, gravel, and pegmatites. Estimated value: $1–$5 as an ordinary fragment, or $5–$20 if unusually clear or well-formed.