sedimentary
Kambaba Jasper (Crocodile Jasper)
Stromatolite (Fossilized Algae)
Hardness: 6.5-7 (Mohs); Color: Deep green with black swirls and orbs; Luster: Vitreous to dull; Structure: Cryptocrystalline quartz; Cleavage: None; Specific Gravity: 2.6-2.7
- Hardness
- 6
- Color
- Deep green with black swirls and orbs
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6.5-7 (Mohs); Color: Deep green with black swirls and orbs; Luster: Vitreous to dull; Structure: Cryptocrystalline quartz; Cleavage: None; Specific Gravity: 2.6-2.7
Formation & geological history
Actually a fossil rather than a true jasper, it is composed of fossilized cyanobacteria (blue-green algae) that created stromatolite structures. These date back over 3 billion years, primarily found in the sedimentary rocks of Madagascar and South Africa.
Uses & applications
Commonly used in lapidary arts for cabochons, beads, and decorative carvings. It is also highly popular in the metaphysical community for its perceived calming properties.
Geological facts
Despite its name, it is not a true jasper but a fossilized algae structure known as a stromatolite. These structures represent some of the oldest evidence of life on Earth and were responsible for creating the oxygen in our early atmosphere.
Field identification & locations
Identified by its distinctive 'crocodile-skin' pattern of dark green and black swirls. Best found in Madagascar. To identify, look for the orbicular, circular patterns that distinguish it from standard green jasper or ryolite.
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