sedimentary
Kambaba Jasper
Stromatolite Jasper (Microcrystalline Quartz with Fossilized Cyanobacteria)
Hardness: 6.5-7 (Mohs scale), Color: Dark green to black with orbicular green swirls, Luster: Vitreous to dull (polished in image), Crystal Structure: Hexagonal (cryptocrystalline), Specific Gravity: 2.58-2.91
- Hardness
- 6
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Physical properties
Hardness: 6.5-7 (Mohs scale), Color: Dark green to black with orbicular green swirls, Luster: Vitreous to dull (polished in image), Crystal Structure: Hexagonal (cryptocrystalline), Specific Gravity: 2.58-2.91
Formation & geological history
Formed over 3 billion years ago in the Precambrian period, these are fossilized stromatolites created by ancient cyanobacteria colonies in marine environments, predominantly in Madagascar and South Africa.
Uses & applications
Primarily used for lapidary work, jewelry (beads and cabochons), metaphysical products, and as a collector's specimen.
Geological facts
Despite the name, it is technically a fossilized algae/cyanobacteria colony rather than a traditional jasper. It is one of the oldest fossils on Earth.
Field identification & locations
Identified by its characteristic dark green matrix and unique 'orbicular' circular swirled patterns of lighter green. Commonly found in Madagascar. Look for the distinct fossils of prehistoric algae.
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