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 trigonal crystal structure. The white appearance comes from microscopic fluid inclusions or defects.

Identified August 9, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich hydrothermal fluids or magmas crystallize in veins and cavities, commonly in igneous and metamorphic rocks. Quartz is geologically widespread and may form from Precambrian through recent ages.

Uses & applications

Used for glass, ceramics, abrasives, engineered stone, and electronics; attractive pieces are collected or used decoratively, though this specimen appears relatively ordinary.

Geological facts

Milky quartz is a common quartz variety rather than a distinct mineral species. Its hardness makes it resistant to weathering and a frequent component of sand and sediment.

Field identification & locations

Identify it by its white translucent body, glassy sparkle, lack of cleavage, and ability to scratch glass; a steel knife generally does not scratch it. Common worldwide, especially in quartz veins and granite pegmatites.