mineral

Milky quartz (quartzite possible)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Typically hardness 7 Mohs, white to translucent, vitreous-to-waxy luster, conchoidal fracture, and no cleavage; this rough specimen appears massive and slightly weathered. Its granular texture could also indicate quartzite, a metamorphic quartz rock.

Identified August 30, 2026More mineral →

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Physical properties

Formation & geological history

Milky quartz forms when microscopic fluid inclusions or defects cloud hydrothermal quartz veins; quartzite forms when quartz-rich sandstone is metamorphosed. Formation ages vary widely, commonly millions to billions of years.

Uses & applications

Used as an inexpensive lapidary and collecting material, silica source, glass ingredient, and aggregate; attractive pieces may be polished for décor or jewelry.

Geological facts

The cloudy appearance is caused mainly by microscopic fluid inclusions, not a separate white mineral. Quartz is one of Earth’s most abundant and chemically durable minerals.

Field identification & locations

Identify it by its white translucency, glassy fracture, lack of cleavage, and ability to scratch ordinary glass; a steel nail should not scratch it. Common in hydrothermal veins, granitic terrains, quartzite outcrops, and stream gravels worldwide.