mineral

Dzi Bead (Etched Chalcedony)

Cryptocrystalline Quartz (SiO2) with chemical etching

Hardness: 6.5-7 Mohs. Color: Deep brown to black with cream-white etched patterns. Luster: Waxy to vitreous. Structure: Microcrystalline. Cleavage: None. Specific Gravity: 2.58-2.64.

Hardness: 6
Color: Deep brown to black with cream-white etched patterns
Luster: Waxy to vitreous

Identified February 20, 2026More mineral →

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Physical properties

Hardness: 6.5-7 Mohs. Color: Deep brown to black with cream-white etched patterns. Luster: Waxy to vitreous. Structure: Microcrystalline. Cleavage: None. Specific Gravity: 2.58-2.64.

Formation & geological history

Formed as secondary deposits in volcanic rock cavities (Agate/Chalcedony bases). The etched patterns are man-made (not geological) through ancient or modern chemical processes involving heat and alkali.

Uses & applications

Primarily used as a protective amulet, jewelry, and for cultural/religious practices in Himalayan regions like Tibet and Bhutan. Highly valued by collectors of ethnographic beads.

Geological facts

Authentic ancient Dzi beads date back over 1,000 to 2,000 years and are considered of celestial origin in Tibetan culture. The specific pattern on this bead features circular 'eyes' and geometric lines believed to ward off evil.

Field identification & locations

Identified by the distinct white etched patterns that penetrate the stone's surface. Can be found in Himalayan markets. For collectors, authenticity is determined by surface wear, 'blood spots' (iron inclusions), and etching depth.

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