This is a pretty Blue Sea Sediment Jasper cabochon. This sample is good for those interested in collecting the many forms of Agate, Jasper, or sometimes other minerals, or for those interested in pendant jewelry.
Usually mined in Hubei China Sea Sediment Jasper is also known as African Opal, Aqua Terra Jasper, and Impression 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.