Would you also like to cast such beautiful dice using a closed mold?
With the right materials and a little practice, you can do it in no time!
These are the products I used:
Silicone for the mold: https://www.siliconesandmore.com/nl/wacker-elastosil-vario-15-catalyst-vario.html
Epoxy (different from the video, but here the glitter doesn't sink): https://www.siliconesandmore.com/nl/sam-ht-laminating-epoxy-resin-hittebestendig-tot-1.html