mineral

Tumbled pale quartz (likely milky or citrine-like quartz)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Hardness 7 Mohs; translucent cream-yellow color, vitreous to slightly resinous luster, hexagonal crystal structure, and indistinct cleavage with conchoidal fracture. The rounded shape indicates natural or human tumbling/wear.

Identified September 8, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich hydrothermal fluids, igneous melts, and sedimentary veins; specimens may range from ancient Precambrian to younger deposits. The yellow tint can result from iron staining or minor irradiation and heating.

Uses & applications

Common quartz is used in glass, ceramics, abrasives, electronics, and ornamental stones; attractive pieces are used in inexpensive jewelry and collections.

Geological facts

Quartz is one of Earth’s most abundant minerals and is piezoelectric, producing an electrical charge under pressure. Its exact variety cannot be confirmed reliably from an image alone.

Field identification & locations

Look for glassy luster, translucency, conchoidal fracture, and resistance to scratching by steel; it should scratch ordinary glass. Common sources include Brazil, Madagascar, the United States, and many global vein deposits.