From Wikimedia.
Marie de Rohan's dress features a jeweled bodice and jeweled neckline with sleeves and some sort of over-dress of a different color.
Keywords: Marie de Rohan, Duchess, Albert family, French, long straight coiffure, jeweled headdress, off shoulder scoop neckline, modesty piece, elbow length under-sleeves, bodice, bateau neckline, elbow length puffed over-sleeves, lining, vee waistline, over-skirt, under-skirt, necklace, earrings