Here's one of several possible methods of work. You always have to remember that SU is essentially a low poly modeller; it was never designed or intended to deal with small-scale, high poly detail. Nevertheless you can generally achieve a decent result with surprisingly few faces. In fact, the fewer the better, as this kind of organic stuff can rarely be done without getting in there and doing a whole load of cleaning up in the wake of various automated scripts.
This model is huge, ready to be scaled down when complete. I've also deliberately left some cleaning up to do on the underside...to illustrate why you should avoid generating too many polys. You'll notice that the bevel script doubled the number of segments in the ring...so I started off with it being noticeably facetted.
You can also see that despite it only being beveled, not round-cornered, it still looks reasonably smooth in a photoreal render.
[image: 2Rft_ring.jpg]
ring.skp