Vintage estate 10KP plumb gold open Filigree yellow gold retail amethyst halo set ring

Product Name: Vintage estate 10KP plumb gold open Filigree yellow gold retail amethyst halo set ring
Vintage estate 10KP 10 karat plumb Yellow Gold open Filigree & Amethyst Marquise shaped raised Halo Set Ring. I don't have the ring size but it Measures approximately 19.8mm in diameter or retail width which I believe is between a 9.5 -10 that's a loose guess. Inside the ring it reads 10KP. Ring is In excellent used condition. This is an estate piece that had been in my family. It weighs approximately 4 grams or a little more.