The Medusa pendant M size model for 5-Axis CNC and SLA, Micro-SLA, DLP, SCP, MJM 3D printing.

Diameter - 45 mm / 1.771 inches
Loop hole - 5.7 x 4.3 mm / 0.224 x 0.169 inches
Z axis height ~12 mm / ~ 0.472 inches
Аverage thickness ~0.8 mm / ~0.031 inches

Please, pay attention. The 3DM file contains the Medusa's head as a mesh,
but there is an additional file in which there is only the Medusa's head as solid NURBS

Also in the 3DM file there is an additional round base with a pattern without two mounting holes.

Besides STP (solid), OBJ and ZTL files, I attached the TSM file of solid Medusa to adjust with T-Splines.

The Pendant will well look in Rose Gold, White Gold, Silver or Platinum, and Yellow 18K Gold.
STL files are healed and ready to prototype.

I will be glad for your feedback. Thank you! )

Best wishes, JWORX.