I am a HUGE fan of H. Stern, especially the stars line. The rings are totally worth it.
the ring is available in several sizes. NM has the GIANT one and the small. The giant one is quite a statement and is gorgeous. The small is nice as well -- i wish it had more diamonds, but i love the concept (seeing the star through the stone). I almost bought that one, but then i went for my star ring (without the cut stone, just the star).
They used to have one that was larger than the small (or at least it had more diamonds), but they may not make it anymore or it may only be available at the flagship or in brazil. I saw it at a time that I had no chance of buying it, and now I haven't been successful in finding it....