This slab is one of the only Jasper Stromatolites I have seen with Marcasite Plume. However, because they were just as that portion entered the stone, the back side of that part is rough and would probably be very difficult to cab. Therefore, I recommend this one being a display, with all it's stunning beauty. Apple Valley Jasper is collected from the exact location of the famous Apple Valley Agate (Sahara Desert of Morocco), but it is a fossil stromatolite. Stromatolites are ocean-colonizing bacteria called cyanobacteria that get trapped in sediment layers. Stromatolites are one of the earliest known fossils; in some locations worldwide, they are still being formed.