mineral

Milky quartz-rich rock

Quartz (silicon dioxide, SiO₂), likely with mica or feldspar inclusions

AI-generated identification · may be incorrect

Hardness about 7 Mohs; white to translucent, vitreous to pearly luster, irregular fracture, and no obvious cleavage. The specimen appears massive and granular rather than a single well-formed crystal.

Identified August 11, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallized from silica-rich hydrothermal fluids or an igneous pegmatite; inclusions may indicate a quartz vein or altered host rock. Its exact geological age and setting cannot be determined from the image alone.

Uses & applications

Common quartz is used in glass, ceramics, electronics, abrasives, and engineered stone; attractive pieces are collected or used decoratively. This rough specimen has modest commercial value.

Geological facts

Milky color results from microscopic fluid inclusions, fractures, or impurities scattering light. Quartz is one of Earth’s most abundant and chemically durable minerals.

Field identification & locations

Identify it by its glassy appearance, lack of cleavage, white translucency, and ability to scratch ordinary glass; a steel nail will not scratch it. Common in quartz veins, pegmatites, granites, and metamorphic rocks worldwide.