sedimentary
Kambaba Jasper
Stromatolite (Fossilized Algae)
Hardness: 6.5-7 (Mohs scale); Color: Dark green to black with lime green or dark swirls/circles; Luster: Vitreous to dull; Crystal structure: Microcrystalline (Trigonal); Cleavage: None; Specific Gravity: 2.6-2.9.
- Hardness
- 6
- Color
- Dark green to black with lime green or dark swirls/circles
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6.5-7 (Mohs scale); Color: Dark green to black with lime green or dark swirls/circles; Luster: Vitreous to dull; Crystal structure: Microcrystalline (Trigonal); Cleavage: None; Specific Gravity: 2.6-2.9.
Formation & geological history
Formed over 3 billion years ago through the fossilization of cyanobacteria (blue-green algae) in shallow water, creating layered structures called stromatolites that were later silicified.
Uses & applications
Primarily used for ornamental carvings, jewelry (cabochons and beads), and metaphysical or spiritual collection and meditation.
Geological facts
Despite being called 'Jasper', it is technically a fossilized stromatolite. It contains some of the earliest remnants of life on Earth, representing blue-green algae that helped create the oxygen-rich atmosphere we have today.
Field identification & locations
Identify by its unique 'orbicular' patterns resembling eyes or swirls in shades of deep murky green. Commonly found in Madagascar and South Africa. For collectors, look for high contrast between the green and black areas.
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