build a ring more realistic ring with gem two parts
if you can't print
buy gem here
http://www.sculpteo.com/en/design/relistic-ring-gem-for-ring-base/Fsmwb7jJ?uuid=9PLVLejYkNxMjKONKfv8th#tab=material
buy ring here
http://www.sculpteo.com/en/design/ring-base-part-1-of-ring-with-realistic-gem/8f2wknqo?basket=1&noclickredirect=1&uuid=6269yjslWrFjKoB4eNDMLh#tab=material
https://www.youtube.com/watch?v=LPgoaWTgYvg
http://youtu.be/94NvHgYC6hM