mineral

Milky quartz

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Typically white to translucent with a vitreous to waxy luster; hardness 7 Mohs, specific gravity about 2.65, and no cleavage, showing conchoidal fracture. The specimen appears massive and rounded, with minor orange-brown iron-oxide staining.

Identified September 6, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich fluids crystallize in veins, cavities, and pegmatites, commonly during igneous or hydrothermal activity. Quartz is widespread in rocks of nearly all geological ages.

Uses & applications

Used for glass, ceramics, abrasives, engineered stone, and electronics; attractive pieces are collected or used decoratively. This rough, common specimen has little gem value.

Geological facts

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

Field identification & locations

Identify by its hardness, lack of cleavage, glassy fracture, and inability to scratch it with a steel knife; it should scratch ordinary glass. Common worldwide, especially in quartz veins, granites, pegmatites, and hydrothermal deposits.