mineral

Clear quartz crystal pendant

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Typically Mohs hardness 7, colorless to faintly smoky, with a vitreous luster and hexagonal crystal structure; quartz has indistinct cleavage and specific gravity about 2.65. The image shows a small polished or naturally terminated pendant, possibly with inclusions.

Identified August 30, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich hydrothermal fluids, igneous melts, and metamorphic veins; individual crystals may form over long geological timescales from Precambrian to recent. The metal cap and cord indicate human processing.

Uses & applications

Used extensively in glass, electronics, watches, abrasives, and ornamental objects; clear crystals are sold as jewelry and metaphysical collectibles. A small pendant generally has modest commercial value.

Geological facts

Clear quartz is one of Earth’s most abundant minerals and displays piezoelectricity, producing an electrical charge under pressure. Similar-looking glass lacks quartz’s crystal structure and usually has rounded bubbles or conchoidal fracture.

Field identification & locations

Identify by its glassy luster, high scratch resistance, six-sided prism or pointed termination, and occasional internal veils or fractures; confirm with hardness and refractive tests rather than appearance alone. Common localities include Brazil, Madagascar, the Alps, Arkansas, and many hydrothermal veins.