Boingboing has the details on this little beauty:

“The meteorite has been etched with nitric acid to reveal the characteristic patterns, or Widmanstatten figures, of iron meteorites, and set with 9 gemstones representing the planets of our Solar System. Mercury is represented by a rust colored Sapphire, Venus a golden Sapphire, Earth an irradiated blue Diamond, Mars a Ruby, Jupiter an Opal, Saturn a Cats Eye Chrysoberyl with an inlaid 24k gold ring, Uranus a green Sapphire, Neptune a blue Sapphire and Pluto a black Diamond. What really makes this ring special is that the band of meteorite spins independent of the gold ring, so when it is on, the planets rotate around the wearer’s finger.”