This is an original Edwardian 18k yellow gold and platinum diamond pin. This pin is set with an old mine cut diamond in the center accentuated by rose cut diamonds and square cut rubies. The approximate weight of the center stone is 0.35ct and the approximate total weight of the rose cut diamonds is 0.40ct and the total approximate weight of the rubies is 1ct. The diamonds are H-I color and VS1 clarity. The top of the pin is platinum and the back is 18k yellow gold. The length of this pin is 3 3/4 inches.