O.E. cut diamond is constructed under the study and analysis of optimum optical technology. It exceeds in both radius and brightness compared to excellent cut. Simply, O.E. cut diamond can not be graded by 4C's that is why we use our original grading system.
Quality standard
♦ Carat(weight)
Each box represents the range of carat within the same price.
0.1ct
0.2ct
0.3ct
0.4ct
0.5ct
0.6ct up
0.150ct-0.169ct
0.200ct-0.229ct
0.300ct-0.339ct
0.400ct-0.449ct
0.500ct-0.559ct
Ask
0.170ct-0.199ct
0.230ct-0.249ct
0.340ct-0.369ct
0.450ct-0.499ct
0.550ct-0.599ct
0.250ct-0.269ct
0.370ct-0.399ct
0.270ct-0.299ct
♦ Color
Inspected with naked eye and 10X loupe
Colorless
Almost Colorless
Near Colorless
A
B
C
♦ Clarity
Inspected with naked eye and 10X loupe
Invisible Inclusion
Almost Invisible Inclusion
Little Inclusion
A
B
C
Our quality standard is based on the grading of the Association of Gemological Laboratories Japan.
Description of O.E. cut grading
O.E. cut diamond's grading is in the order of carat, color and clarity
