Arsene Amulet
thingiverse
The ring should fit snugly into place, though I recommend using a small drop of glue. I used this chain generator by sal for the necklace portion of the amulet. https://www.thingiverse.com/thing:28405/files Included a split link that can be used to patch the chain with a bit of glue (on my first print a couple links in the middle misprinted and I didn't want to scrap the whole thing)
Download Model from thingiverse
With this file you will be able to print Arsene Amulet with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Arsene Amulet.