mineral

Milky quartz-bearing rock

Quartz (SiO₂), likely massive milky quartz; possibly quartz-rich pegmatite

AI-generated identification · may be incorrect

White to translucent, vitreous-to-greasy luster, irregular fracture, no obvious cleavage; Mohs hardness 7 and specific gravity about 2.65. The granular, mottled texture suggests quartz intergrown with minor feldspar or mica rather than a single crystal.

Identified August 8, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich hydrothermal fluids, veins, or slowly cooling pegmatitic magma; the specimen’s exact age and setting cannot be determined from the photograph. Common examples range from Precambrian to recent geologic formations.

Uses & applications

Common quartz is used in glass, ceramics, abrasives, electronics, and engineered stone; attractive pieces are sold as display specimens, though this rough sample is unlikely to be a gemstone.

Geological facts

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

Field identification & locations

Look for hardness sufficient to scratch ordinary glass, lack of cleavage, and a white translucent appearance; feldspar inclusions may show flat cleavage surfaces. Common worldwide, especially in quartz veins, pegmatites, and granite terrains.