This is a large sample of a Red Botswana Banded Agate cabochon. This one is good for those interested in collecting the many forms of agate, jasper, or sometimes "other" minerals, or perhaps for someone wanting to make a pendant.
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.