I designed a dodecahedron with bluntly rounded points extruded from each face using Fusion360. Inspired by the Star Fragment items in Animal Crossing: New Horizons, they look great in a silk or glow-in-the-dark filament!
It prints great scaled down too, but I'd advise slowing down to keep a good surface finish - post-processing can be very fiddly if printed smaller than ~10mm tall for jewelry/decoration.
Print settings used in photo:
The author hasn't provided the model origin yet.