mineral

Tumbled pinkish quartz pebble

Quartz, silicon dioxide (SiO₂), likely rose quartz or iron-stained milky quartz

AI-generated identification · may be incorrect

Hardness 7 Mohs; pale pink to cream with reddish-brown inclusions, vitreous to waxy luster, translucent edges, and no visible cleavage. Quartz is trigonal and has specific gravity about 2.65.

Identified August 30, 2026More mineral →

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Physical properties

Hardness 7 Mohs; pale pink to cream with reddish-brown inclusions, vitreous to waxy luster, translucent edges, and no visible cleavage. Quartz is trigonal and has specific gravity about 2.65.

Formation & geological history

Formed in silica-rich hydrothermal veins or pegmatites, with the color commonly caused by microscopic inclusions or trace iron; the rounded shape is human-tumbled. The specimen’s geological age cannot be determined visually.

Uses & applications

Used as an inexpensive lapidary, decorative, and jewelry material; small tumbled pieces are mainly sold for collecting or ornamentation.

Geological facts

Quartz is one of Earth’s most abundant minerals and is the defining component of many stones, including granite, quartzite, and sandstone.

Field identification & locations

Identify by its glassy appearance, lack of cleavage, conchoidal fracture, and ability to scratch ordinary glass; a steel nail should not scratch it. Common sources include Brazil, Madagascar, India, and the United States.