Ora pendant, by Bathsheba Grossman on shapeways.
Left: smaller, in polished grey steel
Right: polished gold steel
Mini Tuskshell by Bathsheba Grossman on shapeways.
Material: “white strong & flexible polished plastic” (feels more like a shell than like plastic).
Ghost spinning top by Michiel Cornelissen on shapeways.
Left: polished nickel steel
Right: matte black steel
Warning: as much as I like these Shapeways products: they use UPS for delivery which can be a bad surprise with up to 50% additional costs to what you payed to Shapeways!