Whats the difference between Ideal Cut, Premium Cut, etc. grades?
The terms “Premium Cut”, “Tolkowsky Ideal Cut”, and “Excellent Ideal Cut” apply only to round diamonds. Stones receive these grades according to certain angle and percentage standards. For example, Premium Cuts have a table percentage from 58.0% to 61.0%, Tolkowsky Ideal Cuts have a table percentage from 53.0% to 58.0%, and Excellent Ideal Cuts have a table percentage from 52.5% to 58.4%. Depth percentages on any of them should not be below 58.0% or above 63.8%.
Related Questions
- How can there be separate cut scores for students in grades 9-12 when the students are placed by English Proficiency level not by grade? Are you scoring based on a students age?
- What effect does the changes in the performance standards (cut scores) in grades 4, 7, and 10 have on AYP and the annual targets?
- Whats the difference between Ideal Cut, Premium Cut, etc. grades?
