metamorphic/sedimentary
Zebra Jasper
Silicon Dioxide (SiO2) with various inclusions
Hardness: 6.5-7 (Mohs); Color: Black and white bands; Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Cleavage: None; Specific Gravity: 2.6-2.9
- Hardness
- 6
- Color
- Black and white bands
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 (Mohs); Color: Black and white bands; Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Cleavage: None; Specific Gravity: 2.6-2.9
Formation & geological history
Formed from compressed sedimentary layers or volcanic ash deposits where minerals (typically manganese or carbon) infiltrated and created distinct banding over millions of years.
Uses & applications
Primarily used for decorative purposes, including cabochons for jewelry, pocket stones, beads, carvings, and metaphysical healing practices.
Geological facts
Despite being called 'Jasper', most zebra-patterned stones of this variety are actually a form of marble or a mixture of quartz and calcium carbonate, which allows for the distinct 'zebra' contrast.
Field identification & locations
Identify in the field by its distinct high-contrast black and white striations; it will not scratch easily with a knife if it is quartz-based. Commonly found in India, Russia, and Africa.
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