Prepared for printing or CNC-milling and tested STL files and Rhino3D source file for modifying or editing.
It's just two variations of the egg with yolk. :)
One version is made for enameling. Another one contains two parts and needs assembling (welding or soldering): shell and yolk. For the second version you can also use enamel.
Model dimensions: 13x16x2.7(or 2.2)mm.
Cumulative Model volume is ~ 200mm^3 (Estimated weight is ca 2g for sterling silver).
Parts dimensions are shown on the preview pictures.
Parts volumes are:
I'm sorry for the unneeded copies preview pictures. I've added it only for better CGTrader's publishing score.