sedimentary
Kambaba Jasper
Stromatolite (Microbial mat fossil in silicified sediment)
Hardness: 6.5-7 (Mohs scale); Color: Dark green to black matrix with circular orbo-like green patterns; Luster: Vitreous to dull; Crystal structure: Microcrystalline (Quartz/Chalcedony); Specific gravity: 2.6-2.9.
- Hardness
- 6
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6.5-7 (Mohs scale); Color: Dark green to black matrix with circular orbo-like green patterns; Luster: Vitreous to dull; Crystal structure: Microcrystalline (Quartz/Chalcedony); Specific gravity: 2.6-2.9.
Formation & geological history
Formed through the fossilization of oxygen-producing cyanobacteria (blue-green algae) in ancient sedimentary environments during the Archean and Proterozoic eons, later replaced by silica.
Uses & applications
Used primarily in lapidary arts for jewelry, decorative carvings, palm stones, and within metaphysical or spiritual collecting communities.
Geological facts
Despite its name, it is technically a fossilized stromatolite rather than a true jasper. It contains some of the earliest evidence of prehistoric life on Earth dating back over 3 billion years.
Field identification & locations
Identify by its unique 'eye' or 'crocodile' skin patterns of green and black circles. It is primarily sourced from the Bongolava region of Madagascar.
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