sedimentary

Kambaba Jasper

Stromatolite (Fossilized Algae)

Hardness: 6.5-7 (Mohs scale); Color: Deep green to black with swirling dark green/black circular patterns; Luster: Vitreous to dull; Crystal Structure: Microcrystalline (Cryptocrystalline quartz); Cleavage: None; Specific Gravity: 2.6-2.9

Hardness: 6
Luster: Vitreous to dull

Identified June 21, 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

Formation & geological history

Kambaba Jasper is a fossilized sedimentary rock containing cyanobacteria (blue-green algae) dating back approximately 3 billion years. It formed through the fossilization of microbial mats in Precambrian environments.

Uses & applications

Primarily used for lapidary work including cabochons, beads, and carved decorative objects like hearts or spheres. It is highly valued in metaphysical communities as an 'Earth stone' for grounding.

Geological facts

Despite its name, it is technically an ancient fossil (Stromatolite) rather than a true jasper. It is one of the oldest living fossils on Earth, representing some of the earliest life forms that contributed oxgyen to our atmosphere.

Field identification & locations

Identify by its unique 'orbicular' deep green eye-like patterns and high polish. It is almost exclusively found in the west-central Bongolava region of Madagascar. Collectors should look for distinct circular bands and a lack of transparency.