sedimentary

Jasper (Zebra Jasper)

Silicon Dioxide (SiO2) with impurities

Hardness: 6.5-7 (Mohs scale), Color: Creamy white to tan with dark grey or brown banding, Luster: Vitreous to waxy, Crystal Structure: Trigonal (microcrystalline/cryptocrystalline quartz), Cleavage: None (conchoidal fracture), Specific Gravity: 2.6-2.9.

Hardness: 6

Identified March 31, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed from the consolidation of microcrystalline quartz or volcanic ash. The unique 'zebra' patterns are created by the secondary deposition of iron oxides or other mineral impurities as the host rock undergoes chemical changes over millions of years.

Uses & applications

Commonly used in lapidary arts for beads, cabochons, and tumbled stones. Due to its hardness, it is also popular for decorative carvings, palm stones, and meditation tools.

Geological facts

Jasper is a variety of chalcedony. The name 'Jasper' is derived from the Greek word 'iaspis', meaning spotted stone. Zebra Jasper specifically is often associated with balance because of its contrasting colors.

Field identification & locations

Identify in the field by its distinctive 'swirled' or striped pattern, high hardness (it cannot be scratched by a steel knife), and smooth, waxy feel when polished. It is widely found in India, Russia, and Africa.

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