mineral

Likely quartz-rich stone, possibly quartzite or milky quartz

Quartz (silicon dioxide, SiO₂); exact rock identification is uncertain from the image

AI-generated identification · may be incorrect

White to gray, dull-to-glassy luster, massive and granular with no obvious cleavage; quartz hardness is Mohs 7 and specific gravity is about 2.65. The rounded, weathered surface may indicate a quartz pebble or quartzite fragment.

Identified August 26, 2026More mineral →

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Physical properties

Formation & geological history

Quartz forms in igneous, metamorphic, and hydrothermal environments; quartzite forms when sandstone recrystallizes during metamorphism. Its age cannot be determined from the photograph.

Uses & applications

Common quartz is used in glass, ceramics, abrasives, electronics, and construction aggregate; attractive pieces are collected or used decoratively, but this specimen appears low-grade.

Geological facts

Quartz is one of Earth’s most abundant minerals and has a distinctive conchoidal fracture rather than cleavage. White “milky” quartz gets its opacity from microscopic fluid inclusions or fractures.

Field identification & locations

Found widely in veins, stream gravels, pegmatites, and quartz-rich metamorphic rocks. A glass-scratch test, lack of cleavage, and translucent edges support quartz; acid testing is unnecessary.