mineral

Milky quartz fragment

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Typically white to translucent with a vitreous to sugary luster; Mohs hardness 7, no cleavage, conchoidal fracture, and hexagonal crystal structure. The specimen appears granular and naturally fractured, though exact identification is limited by the photograph.

Identified September 22, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich fluids crystallize in veins, cavities, and igneous or metamorphic rocks. Quartz is extremely ancient and occurs in rocks ranging from Precambrian to modern geological ages.

Uses & applications

Common quartz is used in glass, ceramics, abrasives, engineered stone, electronics, and construction aggregate; attractive pieces are collected or used decoratively. This small rough fragment has minimal commercial value.

Geological facts

Milky appearance results from microscopic fluid inclusions, fractures, or dispersed impurities that scatter light. Quartz is one of Earth’s most abundant and chemically durable minerals.

Field identification & locations

Identify by its glassy appearance, lack of cleavage, scratch resistance, and ability to scratch ordinary glass; confirm with hardness and conchoidal fracture tests. Common worldwide, especially in hydrothermal veins and granitic or metamorphic terrains.