sedimentary
Kambaba Jasper
Stromatolite Jasper (Microcrystalline Quartz with Cyanobacteria fossile)
AI-generated identification · may be incorrectHardness: 6.5-7 (Mohs); Color: Deep forest green with black swirling orbs; Luster: Vitreous to dull; Structure: Microcrystalline; Specific Gravity: 2.6-2.7
- Hardness
- 6
- Color
- Deep forest green with black swirling orbs
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6.5-7 (Mohs); Color: Deep forest green with black swirling orbs; Luster: Vitreous to dull; Structure: Microcrystalline; Specific Gravity: 2.6-2.7
Formation & geological history
It is a fossilized algae (stromatolite) dating back approximately 3 billion years, formed through the precipitation of calcium carbonate or silica by cyanobacteria in ancient shallow marine environments.
Uses & applications
Primarily used for lapidary work, decorative spheres, carvings, jewelry, and as a collector's specimen due to its unique fossil patterns.
Geological facts
Though called 'Jasper', it is actually a fossilized stromatolite. It contains records of some of the earliest life forms on Earth that oxygenated our atmosphere.
Field identification & locations
Identified by its distinctive dark green base and 'crocodile-like' black circular patterns. Primarily sourced from the Bongolava region in west-central Madagascar.
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