Inspired by the old school brass and copper deep sea diver helmets. 6 dots wouldn't fit well in the helmet grill so I made the opening at the bottom of the helmet a secret treasure cache of 6 shiny pearls and a golden starfish

Available in raw resin $10 and painted $20 (last picture is an example of a random unpainted dice)

All my dice are made from solid 3d printed resin. The painted versions are sprayed with 3 layers of clear coat so they are usable but I would suggest rolling them on a soft surface to avoid chipping or wear and tear on the paint job.