Cushion Diamonds in Dallas, Texas at Shira Diamonds Dallas. Shira Diamonds Dallas has over 300 cushion cut diamonds for sale in Dallas, Texas. We are now open to the public with our wholesale diamond prices on our cushion diamonds. This diamond is a D Color and has SI1 Clarity. The weight of this diamond is 2.46ct. We have smaller and larger cushion diamonds for sale. Call us today at 214-336-8629.