sedimentary
Kambaba Jasper (Crocodile Jasper)
Stromatolitic Rhyolite/Jasper (SiO2)
Hardness: 6.5-7 on Mohs scale; Color: Dark green with black orbicular swirls/spots; Luster: Vitreous to dull; Crystal structure: Microcrystalline (trigonal); Specific gravity: 2.6-2.9
- Hardness
- 6
- Color
- Dark green with black orbicular swirls/spots
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6.5-7 on Mohs scale; Color: Dark green with black orbicular swirls/spots; Luster: Vitreous to dull; Crystal structure: Microcrystalline (trigonal); Specific gravity: 2.6-2.9
Formation & geological history
Formed from fossilized algae (stromatolites) and volcanic ash deposits over 3 billion years ago. It is technically an orbicular sedimentary rock composed of microcrystalline quartz and silicate minerals.
Uses & applications
Primarily used for decorative purposes, lapidary arts like cabochons, ornamental carvings, and widely used in the metaphysical/crystal healing community.
Geological facts
Despite being called jasper, it is actually a fossilized algal formation called a stromatolite, representing some of the oldest records of life on Earth.
Field identification & locations
Identified by its distinctive 'crocodile-skin' pattern of dark green circles on a lighter green background. Predominantly found in the west-central Bongolava region of Madagascar.
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