Kambaba jasper (green stromatolite jasper) swirls deep forest greens around darker orbs — material widely linked to ancient microbial mats, reading like aerial views of primeval swamps. Madagascar is the principal source; hardness about 6.5–7.GEMIC Institute's kambaba pieces are natural, laboratory-certified and photographed exactly as offered. One-of-a-kind patterns; tracked delivery worldwide with our 30-day guarantee.