Loose oval cut diamonds in Dallas, Texas at Shira Diamonds Dallas - Wholesale Diamonds and Custom Diamond Rings. We have 100s of loose diamonds and custom diamond rings in stock. If you are looking for a big oval diamond this could be it. This diamond weighs over 7.50cts ( Carats ) and is I color and SI1 Clarity. This oval diamond is also certified by GIA. If you would like to view this oval cut diamond certified by GIA please give us a call at 214-336-8629.