157 - Extraordinary Edwardian Style Briolette and Round Brilliant Cut Diamond and Platinum Floral Swag Designed 21.00 Carat Diamond Necklace Set with Fancy Natural Color Amber Briolette Cut Diamonds and Further Accented Throughout with White Round Brilliant Cut Diamonds. Signed with Maker's Mark "A". Approximately 21.00 Carats Total Diamond Weight. Has Hidden Safety Clasp and Double Locking Mechanism. Circa Mid 20th Century or Perhaps a Little Later. Shipping $30.00 (estimate $20,000-$30,000)