Make a pretty pendant with matching stones, or use birthstones for family members. Centre stone is 8 mm, and orbiting planets are PP17 stones. Glue and or fold over prongs to secure centre stone - glue the orbiting stones in place. (Stones not included.) Lead, nickel and cadmium free. You could use this Vintage Pagoda, any 8 mm Margarita, or 8 mm Rivoli Drop (yes, it is a pendant and has a hole. But it's not unattractive.)
Lead-free. Nickel-free. By the each.