Vintage Amethyst Sterling 18K Gold Designer Ring

This is a beautiful vintage ring set with a natural emerald cut amethyst set in gold with 18K gold designs. The ring is sterling silver thick band the back has filigree designs, marked 925 18K and BJC. The amethyst has amazing color great clarity approximately 4 carats. The ring is in excellent condition, Ring Size 5.75, Weight 25.1 grams, Face of the ring measures 22mm by 24mm.