mineral

Milky quartz

Quartz (SiO₂), likely massive vein quartz

AI-generated identification · may be incorrect

White to translucent, vitreous luster, irregular fracture, and no obvious cleavage; Mohs hardness 7, trigonal crystal structure, specific gravity about 2.65. The rough, sugary-looking surface may reflect weathering or breakage.

Identified October 10, 2026More mineral →

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Physical properties

Formation & geological history

Quartz commonly crystallizes from silica-rich fluids in fractures and veins, or grows in igneous and metamorphic rocks. Quartz formed across many geological ages; the specimen’s age and exact setting cannot be determined from the image.

Uses & applications

Quartz is used in glass, ceramics, abrasives, electronics, and construction aggregate; attractive pieces may be kept as inexpensive curiosities.

Geological facts

Quartz is one of Earth’s most abundant minerals and can persist after its host rock weathers away.

Field identification & locations

Look for hardness sufficient to scratch ordinary glass, lack of cleavage, and a white-to-clear appearance; common worldwide in veins and gravel. The image supports a quartz identification, but not a precise locality or geological age.