Vintage Corletto 18Kt Yellow Gold & Hand Painted Portrait Diamond Blue Enamel Brooch/Pendant. Measures - 2 1/8" long. Weight - 8.8 dwt. Art Nouveau design. Starting in the 60s, Italian jewelry designer Oreste Giovanni Corletto became a new leader of style and fashion in cities such as Paris, Rome, and New York. His designs were inspired by nature and figurative art, and he was known for his fine quality and craftsmanship.