... but looking for something that might be
suggestive of a planet or heavenly body.
Dave, I don't have any spheres, but azurite looks very similar
to the earth looking at it from space (blues and greens). It is a
little more expensive than most of the common bead type stones.
I'm afraid I also don't know where you can get it in sphere
shape. I'll check some of my supplier's catalogs when I get to