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. This specimen appears massive and somewhat weathered, with possible iron-oxide or clay inclusions.

Identified August 10, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich hydrothermal fluids or igneous melts crystallize in veins and cavities; it occurs from Precambrian to Recent geological settings. The rough matrix suggests a quartz vein or quartz-rich host rock.

Uses & applications

Common quartz is used in glass, ceramics, abrasives, foundry materials, electronics, and engineered stone; attractive pieces are sold as cabinet specimens, though this example is unlikely to be jewelry grade.

Geological facts

Milky appearance results from microscopic fluid inclusions, fractures, or defects scattering light. Quartz is one of Earth’s most abundant minerals and is resistant to weathering.

Field identification & locations

Identify by its glassy appearance, lack of cleavage, conchoidal fracture, and ability to scratch ordinary steel or glass; it should not be scratched by a steel knife. Common worldwide, especially in hydrothermal veins and granitic terrains.