The ring I printed, and then used to propose to my girlfriend.
I printed it with black ABS, and then printed a small white cube and set it with some magic glue eagleapex left at Hive.
I drew the 2d shape in gimp, then had a friend render it in 3d using sketchup (I fail at 3D). I made some adjustments using Blender for the final print.
She said yes! Now to get our MakerBot to print with white gold.