mineral

Milky quartz

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Usually white to translucent with a glassy-to-pearlescent luster; Mohs hardness 7, no cleavage, conchoidal fracture, and hexagonal crystal structure. The specimen appears as a rough, massive aggregate with some small crystal faces.

Identified September 6, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich hydrothermal fluids or igneous melts crystallize in veins and cavities; most specimens are geologically ancient, commonly Paleozoic to Mesozoic or younger depending on locality.

Uses & applications

Used for glass, ceramics, abrasives, engineered stone, and electronics; attractive pieces are sold as inexpensive mineral specimens and occasionally used in jewelry.

Geological facts

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

Field identification & locations

Identify by its white translucency, hardness, lack of cleavage, and ability to scratch ordinary glass; it should not fizz in dilute acid. Common worldwide, especially in quartz veins, pegmatites, and hydrothermal deposits.