Hi Burr, I took what Grendel said to mean that jewelry piece was built in a polygon modeler using subdivision surfaces and was not actually a NURBS model.

For meshing tips to get smoother results out of MoI, first try just moving the slider towards the "More polygons" side to reduce the angle parameter and make more polygons be generated.

If you have areas that are broad in size but have pretty shallow curvature, then the angle parameter alone may not dice that area up enough - for cases like that enter a distance value in the "Divide larger than" option to split up any polygons that are larger than that distance.

- Michael