mineral

Milky quartz (likely)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

White, translucent-to-opaque specimen with a vitreous to waxy luster and irregular fracture; quartz is Mohs hardness 7, has no cleavage, and forms a trigonal crystal structure. The rough surface and uniform whiteness are consistent with massive milky quartz, though image-only identification is not definitive.

Identified August 26, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich hydrothermal fluids crystallize in veins, cavities, and pegmatites, or when quartz grains recrystallize in rocks. Quartz is common from Precambrian to Recent geological settings.

Uses & applications

Used for glass, ceramics, engineered stone, abrasives, and electronics; attractive pieces are sold as inexpensive decorative or metaphysical specimens.

Geological facts

Quartz is one of Earth’s most abundant minerals and is the principal component of many sands and granites. Milky color results mainly from microscopic fluid inclusions and structural defects.

Field identification & locations

Common worldwide, including Brazil, Madagascar, the United States, and Alpine regions. Field tests include hardness against ordinary glass and lack of cleavage; a streak test is white, but avoid scratching valuable surfaces.