This is an excellent collector's piece of Leopardite Jasper, in the shape of a cushion. It has an exceptional polish, and excellent coloration. This sample is great for those interested in collecting the many forms of agate, jasper, or sometimes other minerals.
Jasper is a form of chalcedony quartz, and is opaque rather than clear or translucent like regular quartz or agate. It contains an abundance of impurities which give its interesting appearance. I've heard that there are over 3,000 forms of Jasper!
Although this is a cab, you can also glue on "bails", or have the piece drilled to accept a pinch bail. Either approach will let you turn this sample into a fine pendant. Alternatively, this type of Jasper, along with it's pattern, could be made into an exceptional belt buckle.