Kambaba Jasper Pebble
Highly polished and silky smooth to the touch, Kambaba Jasper is an unmistakable rock that tends to be quite easy to identify because of its rich green colour and distinctive black markings. Unique to Madagascar, it's also known as Crocodile Jasper and Green Stromatolite Jasper.
Having researched Kambaba Jasper thoroughly before writing about it as we do with all of the rocks and minerals in our collection, we have always been led to believe that it was a stromatolite which is a sedimentary rock that's formed from blue-green algae. After extensive research however we were surprised to find out that much of what we have ever read about this material is not wholly accurate.
What we don't want to do is make this article unnecessarily complicated and possibly boring for those who are not interested in the geological make up of rocks and minerals but at the same time, we want to provide factual information for those who are. The following paragraph explains briefly what we now know about this stone from a geological perspective but to find out why there's so much confusion surrounding it, take a look at our full article on Kambaba Jasper.
Kambaba Jasper is not actually a true variety of jasper nor is it a stromatolite so it's not even a sedimentary rock it's volcanic, meaning it's an igneous rock. Its green colouration is caused by the presence of the mineral quartz which features orbs of feldspar embedded with aggregates (structures formed from a mass of fragments/particles loosely compacted together) made up of tiny needles of amphibole which is an important group of mostly dark-coloured minerals which form prism or needle-like crystals. We've also been told that referring to this material as Kambaba "Stone" would be more appropriate.
This Kambaba Jasper pebble would make a great addition to any collection of polished minerals and would also make a great conversation piece.
Weight (grams): 154.6
Size (cms) : 5.8 x 5 x 4.7