mineral

Tumbled quartz crystal (probable)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Small translucent to milky-white, rounded and polished specimen with vitreous luster; quartz has Mohs hardness 7, conchoidal fracture, trigonal crystal structure, and no cleavage. The image is blurred, so exact identification is tentative.

Identified August 15, 2026More mineral →

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Physical properties

Formation & geological history

Quartz forms in igneous, metamorphic, and hydrothermal environments when silica-rich fluids crystallize; specimens may be Precambrian to modern in age. Tumbling has mechanically rounded and polished the natural material.

Uses & applications

Used in glass, ceramics, electronics, abrasives, and ornamental stone; attractive pieces are sold as inexpensive display or craft specimens.

Geological facts

Quartz is one of Earth’s most abundant minerals and is piezoelectric, producing an electrical charge when stressed.

Field identification & locations

Likely quartz if it scratches glass, feels relatively hard, and shows a glassy translucent interior; common sources include Brazil, Madagascar, the United States, and worldwide gravel deposits. A clearer image and an acid/magnet test would improve identification.