Diamond could yield one of the largest and highest quality round polished stones . `` It 's a D color , which is the highest possible graded color you can get , and we believe there is a chance -- a very good chance -- of getting a 100-carat plus '' round stone with the highest color and clarity rankings . The diamond is a very hard material, so it can be cut with a knife or other cutting tool without damaging its surface. Diamond found in Letseng Mine , in Lesotho .
Diamond could yield one of the largest and highest quality round polished stones . The diamond is a very hard material, so it can be cut with a knife or other cutting tool without damaging its surface. Diamond found in Letseng Mine , in Lesotho .