mineral

Clear quartz crystal pendant

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Hardness 7 Mohs; colorless and transparent with vitreous luster, conchoidal fracture, and trigonal crystal structure. The elongated, faceted point appears polished or cut and mounted as jewelry.

Identified September 17, 2026More mineral →

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Physical properties

Hardness 7 Mohs; colorless and transparent with vitreous luster, conchoidal fracture, and trigonal crystal structure. The elongated, faceted point appears polished or cut and mounted as jewelry.

Formation & geological history

Quartz crystallizes from silica-rich hydrothermal fluids, igneous melts, or metamorphic environments; individual crystals range from ancient to geologically recent. This specimen’s exact locality and age cannot be determined visually.

Uses & applications

Used as an ornamental gemstone, pendant, and collectible; quartz is also important in glassmaking, electronics, optics, and abrasives. Clear, well-cut crystals have modest jewelry value.

Geological facts

Quartz is one of Earth’s most abundant minerals and is piezoelectric, producing an electrical charge under mechanical stress. Natural points commonly show six-sided prisms and pyramidal terminations, though this piece is heavily shaped.

Field identification & locations

Identify by exceptional glassy transparency, hardness sufficient to scratch ordinary glass, and lack of cleavage; beware similarly clear glass or cubic zirconia. Common sources include Brazil, Madagascar, the United States, and the Alps.