mineral

Rough quartz (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Typically Mohs hardness 7, white to translucent, with a glassy to greasy luster and no cleavage; it has a hexagonal crystal structure, though this fragment is uncrystallized or broken. The beige coloration may result from iron staining or surface impurities.

Identified August 30, 2026More mineral →

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Physical properties

Formation & geological history

Forms in igneous, metamorphic, and hydrothermal environments when silica-rich fluids or melts crystallize. Quartz is geologically widespread and occurs from Precambrian rocks to modern veins and sediments.

Uses & applications

Used in glassmaking, ceramics, electronics, abrasives, construction aggregate, and ornamental objects; attractive transparent pieces may be cut as gemstones. This small rough fragment has minimal commercial value.

Geological facts

Quartz commonly breaks with curved, conchoidal fractures and can scratch ordinary glass. Milky quartz becomes opaque because microscopic fluid inclusions, fractures, or mineral impurities scatter light.

Field identification & locations

Identify it by its hardness, pale translucent appearance, lack of cleavage, and conchoidal fracture; a steel knife should not scratch it. Common locations include quartz veins, pegmatites, granites, and metamorphic rocks worldwide.