mineral

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Typically white to translucent with a vitreous luster; hardness 7 Mohs, no cleavage, conchoidal fracture, and hexagonal crystal structure (though crystals are worn smooth here). Specific gravity is about 2.65.

Identified August 11, 2026More mineral →

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Physical properties

Formation & geological history

Forms in hydrothermal veins and igneous or metamorphic rocks as silica-rich fluids cool; quartz is common from Precambrian to modern geological settings. This specimen has been mechanically tumbled and polished.

Uses & applications

Used for decorative stones, carvings, countertops, abrasives, glass, and electronics; attractive translucent pieces are sold as inexpensive lapidary or metaphysical specimens.

Geological facts

The cloudy appearance comes from microscopic fluid inclusions, fractures, or mineral impurities. The image does not clearly show diagnostic crystal faces, so white chalcedony or another pale quartz variety is also possible.

Field identification & locations

Common worldwide, including Brazil, Madagascar, the United States, and many quartz-bearing veins. A glass-scratch test can help confirm quartz, but avoid damaging the specimen; polished surfaces and rounded edges indicate tumbling.