mineral
Milky quartz (likely)
Quartz, silicon dioxide (SiO₂)
AI-generated identification · may be incorrectWhite 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.
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Physical properties
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.
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.
