sedimentary

Kambaba Jasper

Stromatolite (Fossilized Algae)

Hardness: 6.5-7 (Mohs scale), Color: Dark green with black circular or orbicular patterns, Luster: Vitreous to dull, Crystal Structure: Trigonal (Microcrystalline), Specific Gravity: 2.6-2.9

Hardness: 6

Identified July 12, 2026More sedimentary →

Explore Kambaba Jasper in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness: 6.5-7 (Mohs scale), Color: Dark green with black circular or orbicular patterns, Luster: Vitreous to dull, Crystal Structure: Trigonal (Microcrystalline), Specific Gravity: 2.6-2.9

Formation & geological history

Formed through the fossilization of blue-green algae (cyanobacteria) in sedimentary environments, creating stromatolite structures. It dates back roughly 3 billion years to the Archaean Eon.

Uses & applications

Mainly used as a decorative stone, for lapidary work such as cabochons, metaphysical practices, and as tumbled collector stones.

Geological facts

Despite being called 'Jasper', it is technically a fossil known as a stromatolite. It is one of the oldest known records of life on Earth.

Field identification & locations

Identify by the unique 'crocodile-skin' or 'eye' patterns in dark green and black. Primarily found in the Bongolava region of Madagascar and parts of South Africa.