mineral

Milky quartz

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Typically white to translucent with a vitreous-to-waxy luster; hardness 7 Mohs, no cleavage, conchoidal fracture, and hexagonal crystal structure. The specimen appears as a small rough, partially crystalline aggregate with iron staining.

Identified August 29, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich hydrothermal fluids or late-stage igneous fluids crystallize in veins and cavities; quartz commonly formed throughout Earth’s geologic history, from Precambrian rocks to modern deposits.

Uses & applications

Used in glass, ceramics, engineered stone, electronics, abrasives, and construction aggregate; attractive pieces are collected but are generally not jewelry-grade.

Geological facts

Milky color results from microscopic fluid inclusions, fractures, or impurities that scatter light. Quartz is one of Earth’s most abundant minerals and is a major component of granite, sandstone, and many veins.

Field identification & locations

Identify it by its glassy appearance, lack of cleavage, hardness sufficient to scratch ordinary glass, and conchoidal fracture; common worldwide in quartz veins, pegmatites, and sedimentary rocks.