mineral

Raw milky quartz (likely quartz/chalcedony fragment)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Typically Mohs hardness 7, white to translucent, with a vitreous to waxy luster; trigonal crystal structure and no cleavage, though this fragment has irregular fracture. The granular, cream appearance could also indicate microcrystalline chalcedony or quartz-rich material.

Identified September 22, 2026More mineral →

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Physical properties

Formation & geological history

Forms from silica-rich hydrothermal fluids, cavities in igneous rocks, veins, or sedimentary deposits; quartz ranges from Precambrian to Recent in age. The rounded edges suggest natural abrasion or tumbling.

Uses & applications

Used in glass, ceramics, abrasives, electronics, construction aggregate, and ornamental stones; attractive translucent pieces may be sold as lapidary rough. Common material has modest value.

Geological facts

Quartz is one of Earth’s most abundant minerals and is piezoelectric. Milky quartz gets its opacity from microscopic fluid inclusions, fractures, or mineral impurities.

Field identification & locations

Common worldwide, especially in hydrothermal veins, granite pegmatites, and stream gravels. Test with a steel file or glass carefully—true quartz should scratch glass; identification is uncertain from the image alone.