Completelly prepared and tested in production printable STL files and 3DM source file ready to editing or modifying.
Sizes: 18.3, 18.7 and 16.3mm are suitable to final sizes in metal 18-18.3, 18.5-18.7 or 16-16.3mm.
All info about gems shown on previewpictures..
Volumes:
Weights:
varies from 4 to 4.4g for sterling silver.
16.3mm ring is slightly heavier because bigger sizes was made thinner (it was first client demand). But all three rings was succesfully produced in metal and sold to satisfied customers.
OBJ's are imported from Rhino as meshes and as NURBS. Untested (anyway OBJ's are useless for production...)