sedimentary

Kambaba Jasper (Crocodile Jasper)

Stromatolite (Fossilized Algae)

AI-generated identification · may be incorrect

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

Identified May 5, 2026More sedimentary →

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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.