One of a kind Millegrain Ring in 18K White gold 6,1 g. set with a Cognac diamond 0,54 ct., pentagon cut Tourmaline, a hexagon cut Amethyst and natural coloured purple diamonds 0,61ct.. Natural colored pruple diamonds are colour treated, the colour is permanent unless they are subject to temperatures above 450°C/850°F. Backside of the ring is made to prevent turning around the finger. Measurement of the 3 stones-setting: 17 X 8,95mm. Size EU 53, US size 6,5.