An Art Nouveau Ceylon sapphire and diamond necklace of gold and white gold. Early 20th century

An Art Nouveau Ceylon sapphire and diamond necklace of 8k and 18k gold and 18k white gold set with an antique cushion cut untreated Ceylon sapphire of approx. 5.35 ct., four old European cut and rose cut diamonds, total approx. 2.0 ct. Length: 46 cm. Early 20th century.