If you don't have a resin printer, it's still possible to make your vision! The main thing is that you need a half of a round object to cast in silicone for the gem. You can use half of a clear ornament, a large round cabochon, etc. instead for your base gem, then follow the resin steps after silicone casting your shape. The frame can be sculpted out of clay or made out of eva foam based on the size of the gem you make.