mineral

Milky quartz

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Hardness 7 Mohs; white to translucent, vitreous-to-waxy luster, massive or poorly crystallized with no cleavage and conchoidal fracture. Specific gravity is about 2.65.

Identified September 19, 2026More mineral →

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Physical properties

Hardness 7 Mohs; white to translucent, vitreous-to-waxy luster, massive or poorly crystallized with no cleavage and conchoidal fracture. Specific gravity is about 2.65.

Formation & geological history

Forms when silica-rich hydrothermal fluids or magmas crystallize in veins and cavities, commonly in igneous and metamorphic rocks; specimens may range from Precambrian to recent geological settings.

Uses & applications

Used as a silica source for glass, ceramics, abrasives, and engineered stone; attractive pieces are collected, though this rough specimen has limited jewelry value.

Geological facts

Its cloudy appearance comes from microscopic fluid inclusions, fractures, or mineral impurities rather than a different quartz composition.

Field identification & locations

Identify by its glassy translucence, lack of cleavage, conchoidal fracture, and ability to scratch ordinary glass; common worldwide in quartz veins, granite pegmatites, and metamorphic terrains.