mineral

Milky quartz fragment

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Typically white to translucent with a vitreous-to-waxy luster, hardness 7 Mohs, no cleavage, conchoidal fracture, and specific gravity about 2.65; the specimen appears naturally weathered or broken.

Identified August 25, 2026More mineral →

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Physical properties

Typically white to translucent with a vitreous-to-waxy luster, hardness 7 Mohs, no cleavage, conchoidal fracture, and specific gravity about 2.65; the specimen appears naturally weathered or broken.

Formation & geological history

Forms when silica-rich fluids crystallize in veins, cavities, and igneous or metamorphic rocks; quartz is common from Precambrian to modern geological settings.

Uses & applications

Used for glass, engineered stone, abrasives, electronics, and ornamental pieces; milky quartz has modest jewelry and collecting value.

Geological facts

Its cloudy appearance results from microscopic fluid inclusions, fractures, or dispersed mineral impurities rather than a separate mineral species.

Field identification & locations

Identify by hardness—quartz scratches glass—and its lack of cleavage and irregular conchoidal fracture. Common worldwide, especially in quartz veins, granite, pegmatite, and metamorphic terrains.