mineral

Milky quartz

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Typically translucent white with a vitreous to waxy luster, irregular conchoidal fracture, and no cleavage; Mohs hardness 7, trigonal crystal structure, and specific gravity about 2.65. The specimen appears naturally rough or partly tumbled, with cloudy internal inclusions and fractures.

Identified September 13, 2026More mineral →

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Physical properties

Formation & geological history

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

Uses & applications

Common quartz is used in glass, ceramics, abrasives, foundry applications, electronics, and engineered stone; attractive pieces are sold as decorative or metaphysical specimens. This small, cloudy specimen has modest commercial value.

Geological facts

Its milky appearance results mainly from microscopic fluid inclusions, fractures, or structural defects scattering light. Quartz is one of Earth’s most abundant and durable minerals.

Field identification & locations

Identify it by its glassy appearance, hardness sufficient to scratch ordinary glass, lack of cleavage, and conchoidal fracture; it should not fizz in dilute acid. Common localities include Brazil, Madagascar, the United States, Switzerland, and India.