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, and hexagonal crystal structure. The specimen appears massive and weathered, with possible iron-oxide yellow staining.

Identified September 6, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich fluids crystallize in veins, cavities, or igneous and metamorphic rocks; quartz is mostly Precambrian to modern in age. The rounded shape likely results from natural weathering or human tumbling.

Uses & applications

Common quartz is used in glass, ceramics, abrasives, electronics, and engineered stone; attractive pieces are sold as inexpensive decorative or lapidary material.

Geological facts

Quartz is one of Earth’s most abundant minerals and resists weathering, often accumulating in stream gravels and soils.

Field identification & locations

Identify by its hardness, lack of cleavage, pale translucent appearance, and glassy fracture; it will scratch ordinary glass but not be scratched by a steel knife. Common worldwide, especially in quartz veins and granitic terrains.