sedimentary
Zebra Jasper
Silicon Dioxide (SiO2) with inclusions
Hardness: 6.5-7 (Mohs scale); Color: Greenish-olive with dark black/grey stripes; Luster: Vitreous to waxy (smooth when polished); Crystal Structure: Trigonal (Microcrystalline); Specific Gravity: 2.6-2.7
- Hardness
- 6
- Color
- Greenish-olive with dark black/grey stripes
- Luster
- Vitreous to waxy (smooth when polished)
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Physical properties
Hardness: 6.5-7 (Mohs scale); Color: Greenish-olive with dark black/grey stripes; Luster: Vitreous to waxy (smooth when polished); Crystal Structure: Trigonal (Microcrystalline); Specific Gravity: 2.6-2.7
Formation & geological history
Formed through the deposition of silica-rich fluids in sedimentary environments. Its distinct stripes are created by the compression of clay and other mineral materials over millions of years.
Uses & applications
Primarily used for lapidary work, jewelry (beads, cabochons), home decor, and spiritual/metaphysical collecting.
Geological facts
Despite being called 'Jasper', many color variations of Zebra stones are actually quartzites or marbles; however, the olive/black variety is typically a true microcrystalline jasper.
Field identification & locations
Identify by its characteristic 'zebra' striping and high hardness (it cannot be scratched by a steel blade). Commonly found in Australia, Africa, and India.
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