sedimentary

Zebra Jasper

Tainted Silicate (mainly Quartz/Chalcedony/Calcite)

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs); Color: Alternating bands of black/dark grey and white/cream; Luster: Vitreous to waxy (when polished); Structure: Cryptocrystalline; Specific Gravity: 2.6-2.9.

Hardness: 6
Color: Alternating bands of black/dark grey and white/cream
Luster: Vitreous to waxy (when polished)

Identified July 21, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 (Mohs); Color: Alternating bands of black/dark grey and white/cream; Luster: Vitreous to waxy (when polished); Structure: Cryptocrystalline; Specific Gravity: 2.6-2.9.

Formation & geological history

Formed from the deposition of silica-rich marine sediments or volcanic ash that undergoes compaction and cementation over millions of years. The banding is often a result of rhythmic sedimentation or fluid flow during metamorphism/diagenesis.

Uses & applications

Primarily used for lapidary work including cabochons, beads, decorative carvings, and pocket stones. It is also a popular specimen for metaphysical collections.

Geological facts

Despite the name, some 'Zebra Jaspers' are actually types of marble or banded calcite, but the most common commercial variety is a silicate rock. It is often referred to as a stone of balance.

Field identification & locations

Identified by its distinctive high-contrast striped patterns resembling a zebra. Found commonly in Brazil, Africa (South Africa/Madagascar), and India. Collectors value crisp, clear banding without blurring.