Opal, Cultured Pearl and Diamond Ring by Ehret

"BAGUE OPALE, PERLES DE CULTURE ET DIAMANTS
Opale cabochon, perles de culture, et diamants ronds, or 18K (750), poinçons français, taille 55, poids brut : 9.76 g, poinçon de maître Ehret
OPAL, CULTURED PEARL AND DIAMOND RING
Cabochon opal, cultured pearls, and circular-cut diamonds, 18K gold (750), French marks, size 55, gross weight: 9.76 g, maker's marks Ehret" - Christie's