Just added a ring on top and made the model as one solid stl file. You have to scale the model in your slicing software to be more suitable for your use.
Depending on your printer you maybe need supports below the ring.
Print with white filament and color the curl in a light blue. Looks awesome.
Thx GoldXD for that awesome hearthstone.
Changed the ring a bit to make it sturdier
Changed the ring again couse it cracked too easy for a keychain. If the new ring isn´t sturdy enough i am going to model a hole into to the Stone to fix it directly to a keyring.
Added a second version with the ring facing in the other direction. Better suitable for a necklace.