I offer you 3D model of charming female ring.
In "see in 3d" you can see only 1 part. But you have all 2 details.
From these two parts, the jeweler can easily assemble the ring completely.
Size - 18.3 (57.5EU) Gems 10 * 3 mm (10*0.099 ca = 0.99ca).
File is checked for errors by Magics software is ready to grow on a 3D printer.