Lady's Platinum 1.60ct Yellow Sapphire & Diamond Ring. Ring Size: 6 1/2 (Can be Resized to Fit Most Any Finger) Contains: One Natural Princess Cut Sapphire. Weight Approx: 1.60ct, Color: Yellow, Origin: Sri Lanka (Ceylon). Twenty-Four Natural Fancy Cut Diamonds. Weight Approx: 1.10cttw, Color: G-I, Clarity: VS-SI. This is a rare and fine natural yellow sapphire diamond ring. Today, one of the hottest jewels on the market are natural fancy yellow colored diamonds. Sapphires and diamonds are more similar then you mightexpect. On the hardness scale a sapphire is just a hair away from the hardness of a diamond. Sapphires can be cut the same as diamonds, and as such, it is not impossible to mistake a yellow sapphire for a yellow diamond. The stone is mounted in a handmade estate style platinum mounting.