Ring with brilliant-cut diamond, turquoise, lapis lazuli and pearls

Ring with brilliant-cut diamond, ca. 0.2 ct, STW (I-J)/SI, 7 turquoise cabochon, 6 lapislazuli cabochon, 3 cultured pearls, D: ca. 3 - 4 mm, 18K white gold, 8.6 g, Mid 20th century, signs of age and wear.