Prepared for printing or CNC-milling and tested STL files and Rhino3D source file for 7th and 5th Rhino for modifying or editing..
It's just the crack applied to shape of an egg. :)
2 versions available, one of which is for enameling or for texturing.
Model dimensions: 13x16x2.3mm
Model volume for both version is similar: 193 and 194mm^3 (Estimated weight is less than 1.9g for sterling silver).