Four striking kambaba stones cut as cabochons, highly polished on both sides.
Kambaba jasper is usually easy to recognise because of its rich green colour and black spherical markings. A fine grained rock that takes on a high polish, it's incredibly tactile and a stone that we've featured in as part of our collection for many years.
The polished stones in our photos are arranged in order of weight. The oval stone in the adjacent dropdown list is number 1, number 2 is to its right, 3 is on the left in the second row and number 4 is to its right.
Having carried out extensive research in order to establish what kind of material kambaba stone is, we believe we have finally discovered the truth. For many years we were led to believe it was a stromatolite which is a geological sedimentary structure formed from blue-green algae. We recently discovered that's not true.
The rich green colour is caused by the presence of quartz which features orbs of the mineral feldspar. These are embedded with aggregates (structures formed from a mass of fragments/particles loosely compacted together) made up of tiny needles of amphibole. Amphibole is a group of minerals which form prism or needle-like crystals.
With so many articles online about kambaba stone being geologically incorrect, it wasn't easy to get to the bottom of what this material is. If this is a topic that interests you take a look at the following forum thread. We used this along with other expert information as part of our research into this stone.
Stone 4 | 21.8 grams, 4 x 4 x 0.7 cms This stone has a couple of natural indentations which have not been polished out. They can be seen in our second photo. The stone is on the right in the second row. The indentations are on the two edges facing the camera.