Top rated .50 carat diamond rings US online shop: Combined diamond weight in a finished jewelry piece is referred to as ‘Carat Total Weight’ and abbreviated ‘ct.tw.’ For example, a three stone diamond ring set with three diamonds, each weighing 1/3 carat, weighs approximately a total of one carat or 1.00 ct. tw. Sometimes you will also see jewelry pieces, often containing colored gemstones, stated “total gem weight”. A superior cut will result in light being returned to the eye from the entire top of the diamond. This “edge-to-edge” light performance will enable the diamond to appear larger than diamonds …