mineral

Dzi Bead (Agate)

Chalcedony (cryptocrystalline variety of Quartz), SiO2

Hardness: 6.5-7 (Mohs scale); Color: Dark brown to black base with white etched patterns including circles (eyes) and geometric lines; Luster: Waxy to vitreous; Structure: Cryptocrystalline; Cleavage: None

Hardness: 6
Luster: Waxy to vitreous

Identified February 20, 2026More mineral →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Formed as volcanic agate nodules through silica precipitation in rock cavities. These specific specimens are human-altered through ancient or modern chemical etching and baking processes to create permanent symbolic patterns.

Uses & applications

Used primarily in jewelry, as protective amulets, and as highly valued cultural artifacts in Himalayan regions; significant value in the antique and collectible market.

Geological facts

Dzi beads are considered sacred in Tibetan culture, often called 'Heaven's Pearls'. 'Eye' patterns are the most desirable, with certain counts (like 9-eyed beads) being incredibly auspicious and rare.

Field identification & locations

Look for 'weathering' marks (crescent-shaped indentations) and internal banding typical of agate. Modern replicas are common; authentic ancient beads have patterns that penetrate deep into the stone. Commonly found in Tibet, Bhutan, and the Himalayas.

Other mineral specimens

See all

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

metamorphic

Nephrite Jade

Nephrite

Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Metamorphic Rock

Green Apatite on Albite

Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]

mineral

Epidote

Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)

mineral