mineral

Milky quartz

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Hardness 7 Mohs; white to translucent with a vitreous-to-waxy luster and massive, irregular fracture. Trigonal crystal structure; no cleavage, specific gravity about 2.65.

Identified September 26, 2026More mineral →

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Physical properties

Hardness 7 Mohs; white to translucent with a vitreous-to-waxy luster and massive, irregular fracture. Trigonal crystal structure; no cleavage, specific gravity about 2.65.

Formation & geological history

Forms when silica-rich fluids crystallize in veins or cavities, and also occurs in igneous and metamorphic rocks. Quartz is widespread across geological ages; the specimen’s age cannot be determined from the image.

Uses & applications

Commonly used for ornamental carving, countertops, aggregate, and silica products; attractive pieces may be used in jewelry or collections.

Geological facts

Its cloudy appearance results from microscopic fluid or gas inclusions that scatter light.

Field identification & locations

Identify by its glassy sheen, hardness (it can scratch glass), and lack of cleavage; common worldwide in quartz veins and many rock types. The pictured rough white specimen is consistent with milky quartz.