Model is ready for 3D Printing and prototyping on CNC. Geometry is healed, and fixed all the bad with RP Magics software Gems size on pictureApproximate metal weight gold 14k – 4.66 grams; gold 18k – 5.6 grams; silver 925 Sterling – 3.76 grams. Model volume (for ring size 18 mm): 362.4 cubic mm. You can check out my other products by clicking on the author name s.kim_jewelry_design. Any questions? Please contact me. instagram @s.kim_jewelry_design email skimjewelrydesign@gmail.com facebook s.kim_jewelry_design youtube SKIM Jewelry Design