BVLA's Beaded swirl Threadless 14k Solid Yellow Gold 2mm London Blue Topaz bezel Low profile graduating bead spiral with an overall diameter  of 6mm

Most pieces can be special ordered in:

* any color gemstones

*color gold, also available in 14k and 18k

* threaded or threadless

Beaded Swirl 6mm Threadless Solid Yellow Gold and London Blue Topaz