mineral

Milky quartz in a light-colored host rock

Quartz (SiO₂), likely with feldspar-rich matrix; exact host rock is unclear from the photo

AI-generated identification · may be incorrect

Opaque to translucent white quartz with a glassy-to-waxy luster and irregular fracture; Mohs hardness 7, trigonal crystal structure, no cleavage. The gray patch may be another mineral or shadow, and cannot be identified reliably from the image.

Identified October 10, 2026More mineral →

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Physical properties

Formation & geological history

Quartz commonly forms when silica-rich fluids crystallize in fractures or cavities, or as grains in igneous and metamorphic rocks. Its age and specific formation setting cannot be determined from appearance alone.

Uses & applications

Quartz is used in glass, electronics, abrasives, and decorative stone; attractive pieces may be collected, though this specimen appears ordinary.

Geological facts

Milky color results from tiny fluid or gas inclusions that scatter light.

Field identification & locations

Look for hardness sufficient to scratch glass and lack of cleavage; a simple visual identification cannot establish the host rock or gray inclusion. Quartz occurs worldwide in veins and many rock types.