mineral

Milky quartz

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Hardness 7 Mohs; white to translucent, vitreous luster, and often glassy fracture with no cleavage. Trigonal crystal structure; the cloudy appearance comes from microscopic fluid inclusions or fractures.

Identified August 11, 2026More mineral →

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Physical properties

Formation & geological history

Forms in hydrothermal veins, pegmatites, and cavities in igneous and metamorphic rocks through silica-rich fluids. Quartz is common from Precambrian to modern geological settings; this specimen appears naturally fractured rather than fully crystallized.

Uses & applications

Used for glass, ceramics, foundry flux, electronics, abrasives, and engineered stone; attractive pieces are sold as cabinet or metaphysical specimens. Typical value is modest unless exceptionally clear, large, or well-crystallized.

Geological facts

Quartz is one of Earth’s most abundant minerals and is piezoelectric, producing an electrical charge under pressure. The pictured translucent white material is consistent with milky quartz, though image-only identification cannot exclude clear quartz or calcite.

Field identification & locations

Identify by its hardness, glassy luster, lack of cleavage, and conchoidal fracture; it should scratch ordinary glass but not be scratched by a steel blade. Common worldwide, especially in Brazil, Madagascar, the Alps, and hydrothermal vein districts.