Gemstone Pluto's Satellites Necklaces. Blast into space with nine electric blue druzy coins that orbit around a gleaming braided brass chain. Druzies are natural crystals that form on top of other gemstones like agate, and resemble sugar. They also vary by shape and can be any color under the rainbow, including black. They sparkle in the light and are fun to wear especially for an evening out. Our lightweight necklace falls gracefully along the collar bone, and is both feminine and a touch daring. The chain is adjustable up to 20.25 inches.