Abstract: A jewelry ring assembly includes a base ring having an annular channel on its outer surface and a retained ring disposed in that channel to be freely rotatable about the base ring and capable of wobbling in the channel. The base ring is a single piece of metal and its retaining channel is smoothly concave in width between raised annular edges. The base ring is formed from a cylindrical blank initially having a constant outside diameter across its width, which diameter is smaller than the retained ring inside diameter. The method of fabricating the ring assembly begins with flaring one edge radially outward to a final diameter larger than the retained ring inside diameter. The retained ring is moved over the unflared edge, after which that edge is also flared to the final diameter. Enlarging the annular edges in separate steps permits the base ring to be formed from a single piece of metal while presenting a retaining channel having a smooth concave width.

Abstract: A jewelry ring assembly includes a base ring having an annular channel on its outer surface and a retained ring disposed in that channel to be freely rotatable about the base ring and capable of wobbling in the channel. The base ring is a single piece of metal and its retaining channel is smoothly concave in width between raised annular edges. The base ring is formed from a cylindrical blank initially having a constant outside diameter across its width, which diameter is smaller than the retained ring inside diameter. The method of fabricating the ring assembly begins with flaring one edge radially outward to a final diameter larger than the retained ring inside diameter. The retained ring is moved over the unflared edge, after which that edge is also flared to the final diameter. Enlarging the annular edges in separate steps permits the base ring to be formed from a single piece of metal while presenting a retaining channel having a smooth concave width.