mineral

Milky quartz (rough fragment)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Likely white to cream, opaque milky quartz with a vitreous-to-dull luster and irregular fracture; quartz has Mohs hardness 7, trigonal crystal structure, no cleavage, and specific gravity about 2.65.

Identified October 12, 2026More mineral →

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Physical properties

Likely white to cream, opaque milky quartz with a vitreous-to-dull luster and irregular fracture; quartz has Mohs hardness 7, trigonal crystal structure, no cleavage, and specific gravity about 2.65.

Formation & geological history

Quartz commonly crystallizes from silica-rich fluids in veins and pegmatites, or forms during metamorphism; its age depends on the host deposit and cannot be determined from the image.

Uses & applications

Quartz is used in glass, electronics, abrasives, and decorative stone; attractive pieces may be collected or made into jewelry.

Geological facts

Quartz is among Earth’s most abundant minerals and often occurs in veins cutting through other rocks.

Field identification & locations

The pale, glassy appearance and lack of cleavage are consistent with quartz, but the small rough fragment cannot be identified with certainty from appearance alone. It occurs worldwide; a scratch test on glass can help distinguish it from softer lookalikes.