mineral

Quartz-rich rock, possibly milky quartz vein material

Quartz (SiO₂), likely with iron-oxide staining and minor host-rock inclusions

AI-generated identification · may be incorrect

White to translucent gray, vitreous to dull luster, massive rather than well-crystallized, with irregular fracture and no obvious cleavage; quartz hardness is Mohs 7 and specific gravity about 2.65.

Identified August 30, 2026More mineral →

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Physical properties

White to translucent gray, vitreous to dull luster, massive rather than well-crystallized, with irregular fracture and no obvious cleavage; quartz hardness is Mohs 7 and specific gravity about 2.65.

Formation & geological history

Likely formed when silica-rich hydrothermal fluids filled a fracture, later weathering to expose the piece; precise geological age and host rock cannot be determined from the photograph.

Uses & applications

Common quartz is used in glass, ceramics, engineered stone, abrasives, and electronics; attractive transparent pieces may be collected, though this specimen appears mainly geological rather than gem quality.

Geological facts

Milky appearance results from microscopic fluid inclusions, fractures, or mineral impurities. Brown-orange patches are consistent with weathered iron oxides such as limonite.

Field identification & locations

Look for glassy fracture surfaces, inability to scratch it with a steel knife, and absence of cleavage; quartz should scratch ordinary glass. Common worldwide in veins, pegmatites, and sedimentary rocks.