Vintage Diamond Shape Resin Necklace, Black &Brown, Leather Necklace

Vintage resin diamond shape necklace. Black and brown. Leather necklace. Marked 18KGB. This necklace is in excellent pre-owned condition. No defects that I can see. I consider all offers. Measurements: 1 1/2" across from side to side (point to point) All measurements are approximate. 290/8-26