mineral

Milky quartz

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Hardness 7 Mohs; white to translucent, vitreous-to-waxy luster, typically massive or poorly crystalline, with no cleavage and conchoidal fracture. The specimen appears naturally fractured and slightly weathered, though surface coating or residue cannot be excluded.

Identified August 16, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich fluids crystallize in cavities, veins, and igneous or metamorphic rocks; milky color results from microscopic fluid inclusions. Quartz is widespread from Precambrian to modern geological settings.

Uses & applications

Used in glass, ceramics, electronics, abrasives, countertops, and as a collectible mineral; translucent pieces may be cut or polished, but this example has limited gem value.

Geological facts

Quartz strongly scratches ordinary glass and steel, but should not scratch quartz itself. Its white translucency distinguishes milky quartz from clear rock crystal.

Field identification & locations

Common worldwide, especially in hydrothermal veins, pegmatites, granites, and metamorphic terrains. Look for glassy fracture, lack of cleavage, and hardness; avoid confusing it with calcite, which is softer and cleaves readily.