Compact (and expensive) fidget spinner using 3 ounces of tungsten weights* and solid Filamet* Bronze Filament. printed at 100% infill, it weighs 126g (4.5oz).
Filamet is a high metal content filament from The Virtual Foundry and about 3 to 4 times the weight of regular PLA. The bronze version came from a Kickstarter and may not be available for sale yet, but the copper version is available. The print was sanded and polished.