Kambaba Jasper

Kambaba jasper and crocodile jasper are trade names for a unique, greenish rhyolitic (volcanic) stone found in the west-central Bongolava region of Madagascar. It is full of wisps and irregularly-shaped blackish orbs that some people say resemble crocodile eyes, hence the name “crocodile jasper”. There is a common misconception that Kambaba Jasper is a stromatolite (trace fossils of cyanobacteria), but this is incorrect.