Custom sapphire diamond engagement rings for sale in Dallas, Texas at Diamore Diamonds Dallas - Wholesale Diamonds and Custom Diamond Rings. This sapphire diamond engagement ring has a 1.50ct center blue sapphire and has a total weight of 0.78cts in diamonds in the ring. This ring does not include the center stone. If you would like to view our halo diamond engagement ring please give us a call at 972-750-0300. We have 100s of loose sapphires in stock.