1 Carat Cushion Modified Cut Diamond Very Good Cut D SI2 GIA. This 1 carat loose diamond features Cushion Modified Cut shape and a Very Good cut. This diamond has been certified by GIA diamond laboratory as D color and clarity grade of SI2. Additional loose diamond details: diamond table size: 66.00; diamond girdle: Medium to Very Thick; faceted diamond measurements: 6.12 5.42 3.71; diamond polish: EX; diamond symmetry: VG; diamond culet: N; diamond fluorescence; Strong. James Allen loose diamond Product ID: 105370-US. See an actual photograph of this certified 1 carat Very Good cut diamond.