mineral

Milky quartz

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Typically white to translucent with a vitreous-to-waxy luster; Mohs hardness 7, conchoidal fracture, no cleavage, and hexagonal crystal structure. The specimen appears massive and partly weathered, possibly with minor iron staining or attached host rock.

Identified August 16, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich fluids crystallize in veins, cavities, and igneous or metamorphic rocks. Quartz is widespread from Precambrian terrains to modern hydrothermal environments; exact age cannot be determined from the image.

Uses & applications

Common quartz is used in glass, ceramics, abrasives, engineered stone, electronics, and construction aggregate; attractive pieces are collected or used decoratively rather than as jewelry-grade gems.

Geological facts

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

Field identification & locations

Identify by its glassy appearance, hardness, lack of cleavage, and ability to scratch ordinary glass; unlike calcite, it does not fizz in dilute acid. Common worldwide in hydrothermal veins, granite pegmatites, and metamorphic rocks.