Interleave is an interesting ring that starts as either a domed or flat ring and gets cut in half by the laser.  The pieces left over interleave with each other like gear teeth.  Some people choose to wear such a ring on a necklace, with separated partners each wearing a half to be rejoined as one upon return of the traveling loved one.  The ring shown is a size 10 x 8mm, and the finish is Polished and Angled Brush.  This offers a nice contrast.