gemstone

Amethyst bead bracelet

Quartz, SiO₂; purple variety colored mainly by iron-related defects and irradiation

AI-generated identification · may be incorrect

Mohs hardness 7; translucent purple to lilac, vitreous luster, trigonal crystal structure, and indistinct cleavage with conchoidal fracture. Tiny polished beads may also be mixed quartz varieties or treated material.

Identified August 30, 2026More gemstone →

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Physical properties

Formation & geological history

Amethyst forms in silica-rich hydrothermal cavities, especially in volcanic rocks, where quartz crystals grow over millions of years. Major sources include Brazil, Uruguay, Zambia, Namibia, and Mexico.

Uses & applications

Used extensively in jewelry, ornamental objects, and mineral collecting. Small commercial bracelets commonly have modest value.

Geological facts

Color can fade with prolonged strong sunlight or heating; deeper, more even purple generally increases desirability. Beads are polished and drilled, so natural crystal faces are not visible.

Field identification & locations

Identify by its purple color, glassy luster, quartz-like durability, and lack of obvious cleavage; glass imitations may show bubbles or feel softer. Common bracelet value is approximately $10–$50, rising to $75+ for unusually fine, natural, well-matched beads.