mid-rotatable stress ring 3D model

central stone size: 8mmfull stone size: 1.30mmOur model is prepared in 4 sizes. After the piece is opened, it is enlarged by ring magnification machine and it is kept in place. At each magnification, the rings are enlarged to 6 numbers.Length to be obtained from ring 8: ring size: 14Length to be obtained from ring 10: ring size: 16Length to be obtained from ring 12:ring size: 18Length to be obtained from ring 14:ring size: 20