Can the AGS rating be forged or manipulated or swapped with a lifeless diamond?I was comparing AGS000 at Robbins Bros (RB) and Charles Koll(CK) in San Diego, Ca., and what a difference seeing the diamond in person makes. Although I saw the paperwork of both and I compared each number for exact percentages of table, depth, crown, etc, I still say that the RB diamonds are lifeless and the CK ones are unbelieveably beautiful! When I do a scillination rotation test in sunlight, I was just amused at the RB stone that was rated AGS000, but with the CK AGS000, I was in awe at sheer beauty.How can the 2 diamonds be so different even though they have the same AGS cert? All thing remaining the same. The lifeless RB diamond also performed with the Hearts/Arrow test, which is really strange? Can lighting affect my perception of the diamond performace when it comes to scillination and fire?