(Lot of 7) Multi-stone, yellow gold and silver gilt rings Including 1) black star sapphire and 18k yellow gold ring, size 6.5, gross weight 4.42 grams; 2) cultured pearl, diamond and 14k yellow gold rings, sizes 9 and 5.25; 1) aquamarine, diamond and 14k yellow gold ring, size 6.25; 1) synthetic sapphire and 14k yellow gold ring, size 6; 1) synthetic spinel, white stone and 14k yellow gold ring, 6.25, total gross weight 17.51 grams; together with 1) chalcedony and silver gilt ring, size 10