mineral
Quartz crystal beads
Quartz (silicon dioxide, SiO₂)
AI-generated identification · may be incorrectTypically Mohs hardness 7, colorless to milky white, vitreous luster, trigonal crystal structure, and no true cleavage; the image shows small faceted, likely drilled beads with internal fractures or inclusions.
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Physical properties
Typically Mohs hardness 7, colorless to milky white, vitreous luster, trigonal crystal structure, and no true cleavage; the image shows small faceted, likely drilled beads with internal fractures or inclusions.
Formation & geological history
Quartz crystallizes from silica-rich hydrothermal fluids, pegmatites, and igneous rocks; individual crystals may range from ancient to geologically recent, while the beads are human-cut and polished.
Uses & applications
Used for jewelry, ornamental objects, watches, electronics, glass, and abrasives. Common clear or milky beads have modest decorative value.
Geological facts
Quartz is one of Earth’s most abundant minerals and has piezoelectric properties. Similar-looking material may be rock crystal, milky quartz, or glass imitation.
Field identification & locations
Identify by glassy luster, hardness, conchoidal fracture, and lack of cleavage; quartz scratches ordinary glass, whereas softer glass beads generally do not. Common sources include Brazil, Madagascar, the United States, and China.
