mineral

Milky quartz

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Typically white to translucent with a vitreous to waxy luster, uneven fracture, and no cleavage; Mohs hardness 7, specific gravity about 2.65. The specimen appears massive and milky rather than well-crystallized.

Identified August 25, 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 from Precambrian to modern geological settings.

Uses & applications

Used for glass, ceramics, engineered stone, abrasives, and electronics; attractive translucent pieces are collected or used ornamentally. This rough fragment has modest commercial value.

Geological facts

Its cloudy appearance results mainly from microscopic fluid inclusions, fractures, or other mineral impurities. Quartz is one of Earth’s most abundant and chemically durable minerals.

Field identification & locations

Identify it by its glassy appearance, hardness sufficient to scratch ordinary window glass, lack of cleavage, and conchoidal or irregular fracture. Common worldwide, especially in granite terrains, quartz veins, and pegmatites.