A pearl and diamond necklace, early 20th century, designed as a double strand of graduated pearls

A pearl and diamond necklace, early 20th century, designed as a double strand of graduated pearls measuring 3.2-7.5mm diameter, to a navette-shaped Art Deco clasp set to both sides with circular-cut diamonds, mounted in platinum, length 57cm

A verbal report from GCS states that the majority of the pearls are cultured, and a minority of varying sizes are natural, saltwater