sedimentary

Kambaba Jasper

Rhyolite (with Stromatolite fossil inclusions)

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale); Color: Dark green with black circular patterns or splotches; Luster: Dull to vitreous when polished; Crystal Structure: Microcrystalline; Specific Gravity: 2.6-2.9.

Hardness: 6
Color: Dark green with black circular patterns or splotches
Luster: Dull to vitreous when polished

Identified April 10, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 (Mohs scale); Color: Dark green with black circular patterns or splotches; Luster: Dull to vitreous when polished; Crystal Structure: Microcrystalline; Specific Gravity: 2.6-2.9.

Formation & geological history

Formed in Africa (Madagascar and South Africa) through the fossilization of blue-green algae (Cyanobacteria) colonies in volcanic rhyolite. It dates back to the Archean Eon, over 3 billion years ago.

Uses & applications

Primarily used for lapidary work, jewelry, decorative carvings, and as a collector's specimen. It is popular in metaphysical circles for grounding and meditation.

Geological facts

Despite being called 'Jasper' in the trade, it is technically an exotic rhyolite featuring fossilized stromatolites, which are Earth's oldest known fossils.

Field identification & locations

Identify by its unique 'crocodile skin' appearance (distinct green color with circular black spots). Found predominantly in the Bongolava region of Madagascar and the rift valleys of South Africa.