Lady's 18K White Gold 1.50ct Purple Sapphire. Ring Size: 7 1/2 (Can be Resized to Fit Most Any Finger) Contains: One Oval Cut Purple Ceylon Natural Sapphire. Weight: 1.50ct, Color: Blue/Purple, Clarity: Transparent (L-I), Fluorescence: High. 20 Round Brilliant Cut Natural Diamonds. Weight: 1.00cttw, Color: F-G, Clarity: VS1/VS2. Here is another ring that was one of my most exciting purchases. It is a PURPLE sapphire. Not only is it a purple sapphire, but analogous to an Alexandrite, this stone shows a color change when you move from incandescent light to natural daylight. In natural daylight, this stone shows up a vivid blue. If you're ready for the deal of the week, it has always been my policy that when I buy right, I want to sell right. When I bought this stone, I was advised that it was very unique. I called all of my experts and nobody had ever seen one. When I sent it to the lab and found out about the dual color change, that just compounded my joy. At any rate, I've heard tale of stones like this selling for fantastic sums of money.