Presented here is a cabochon of some material that I have only recently noticed. It is called "Monevea Jasper", but is actually a rhyolite. It consists of lovely blue/green and brown orbs, set in waves of beige, blue/green, and brown. Very unusual and attractive.
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.