Antique Edwardian Pin. Circa. 1915 American. Platinum pin, tested with platinum acid. Bottom of pin is 14K yellow gold, tested with 14K acid. 9 old mine cut diamonds with total approximate weight of .85 carats. F color VVS1. 6 single cut diamonds with total approximate weight of .25 carats. G color. VS1. Total diamond weight on pin is approximately 1.10 carats. All diamonds tested with a diamond tester. The pin measures 2 1/2 inches long and 1/2 inch wide, at it's widest. 7.2 gr...