mineral

Milky quartz

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Typically white to translucent with a glassy-to-waxy luster; hardness 7 Mohs, no cleavage, conchoidal fracture, hexagonal crystal structure, and specific gravity about 2.65. The specimen appears massive and weathered rather than distinctly crystallized.

Identified September 5, 2026More mineral →

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Physical properties

Formation & geological history

Forms in hydrothermal veins, pegmatites, and cavities when silica-rich fluids cool; it occurs from Precambrian to modern geological settings. Its cloudy appearance results from microscopic fluid inclusions, fractures, or impurities.

Uses & applications

Used as a source of silica for glass, ceramics, abrasives, and engineered stone; attractive pieces are collected or used in inexpensive lapidary work and jewelry.

Geological facts

Quartz is one of Earth’s most abundant minerals and is a major component of granite, sandstone, and many metamorphic rocks. Milky quartz commonly develops alongside feldspar, mica, and metallic ores.

Field identification & locations

Identify it by its white translucency, lack of cleavage, conchoidal fracture, and ability to scratch glass; vinegar will not fizz. Common worldwide, especially in quartz veins and granitic terrains.