mineral

Milky quartz

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Likely massive, translucent-to-milky quartz with a vitreous luster and irregular fracture; Mohs hardness 7, trigonal crystal structure, no cleavage, specific gravity about 2.65. The gray appearance may be due to inclusions, surface weathering, or lighting.

Identified October 4, 2026More mineral →

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Physical properties

Formation & geological history

Quartz commonly crystallizes from silica-rich fluids in veins and cavities, or forms as grains in many rock types. It occurs in rocks of many geological ages; the photo alone cannot establish its specific origin or age.

Uses & applications

Quartz is used in glass, ceramics, electronics, and construction aggregate; attractive pieces are collected or sometimes cut and polished.

Geological facts

Quartz is one of Earth’s most abundant minerals and can display conchoidal fracture, producing curved, shell-like break surfaces.

Field identification & locations

Look for hardness sufficient to scratch glass, a glassy luster, and lack of cleavage; common worldwide, especially in veins and pegmatites. The specimen’s exact identification is uncertain from the image, but it appears consistent with massive quartz.