This is a pendant of Sahara Desert Jasper. A rather unique stone that appears to be covered with a layer of mud. until it is cut into.
This Jasper was discovered in 2006 by a lapidary couple during a gem rock hunt in the Eastern Sahara desert in Africa. The difficulties they encountered to include the desert environment with 140 degree temperatures, the remote location far from civilization and supplies and the logistics of getting many pounds of rocks back to the U.S. dictates that this stone is the most expensive of Jasper's for a Lapidary to obtain.
This piece measures 3" x 1 1/8" x 1/4".