mineral

Milky quartz (likely)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

White to translucent, vitreous-to-waxy luster, Mohs hardness 7, no cleavage, and irregular/conchoidal fracture; typically forms a hexagonal crystal structure, though this piece appears broken or tumbled. The flat shape and smooth surface may indicate polishing or abrasion.

Identified September 9, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich fluids fill fractures and crystallize, commonly in hydrothermal veins and igneous or metamorphic rocks. Quartz is geologically widespread and occurs from ancient Precambrian terrains to modern veins.

Uses & applications

Used for glass, engineered stone, abrasives, electronics, and ornamental objects; attractive milky quartz is collected but is generally inexpensive.

Geological facts

Milky whiteness results from microscopic fluid inclusions, fractures, or impurities scattering light. It may be confused with white calcite, feldspar, or man-made glass.

Field identification & locations

Common in quartz veins, granite, pegmatites, and metamorphic rocks worldwide; test with a steel file or glass—quartz should scratch glass and resist a steel blade. Exact identification is uncertain from the image alone.