sedimentary
Zebra Jasper (Zebra Stone)
Tumbled Silicon Dioxide (SiO2) with impurities
Hardness: 6.5-7 on Mohs scale; Color: Black and white patterns; Luster: Vitreous to waxy; Structure: Microcrystalline quartz; Specific Gravity: 2.6-2.9
- Hardness
- 6
- Color
- Black and white patterns
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 on Mohs scale; Color: Black and white patterns; Luster: Vitreous to waxy; Structure: Microcrystalline quartz; Specific Gravity: 2.6-2.9
Formation & geological history
Formed from compressed deposits of silica-rich marine sediments or volcanic ash, with the characteristic stripes resulting from iron and manganese inclusions and quartz veining during metamorphosis or sedimentation.
Uses & applications
Primarily used for ornamental jewelry, tumbled stones for collectors, interior decor, and metaphysical/spiritual practices.
Geological facts
Despite the name 'jasper,' much of what is sold as zebra stone is actually a form of metamorphosed limestone or a calcium carbonate based material, though this specific specimen appears to be the silicated variety.
Field identification & locations
Identify by the high-contrast interlocking black and off-white patterns; often found in Australia, Brazil, and Russia. It is a favorite for beginners due to its striking appearance when polished.
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