This ring is made of dark wood, with inlays of plastic in pink, rose, and orange in a stylish geometric design. I have seen this ring advertised as Bakelite, but it is not. It is however a genuine vintage piece. The plastic may be Lucite or Galalith. The ring is a bit more than one inch high and 7/8 inch across. The inside is smooth and comfortable. There is one small glitch along the edge of one of the side inlays but it feels completely smooth, so it may have occurred in the making of the ring. It is not very easy to see and otherwise the condition is excellent.
The last photo shows other rings from the same collection, listed as items 1427, 1428, and 1429.