William Hanneman

The Hanneman System makes evaluating diamond cuts easier. You can use total height and C/P ratios to cut grade round brilliants without subjective…

The Hanneman System simplifies cut diamond grade categories. Learn how to identify the worst cut stones quickly before taking unnecessary measurements.…

In the Hanneman cut grading system, you must consider diamond proportions to grade a round brilliant stone. Learn what they are and how to calculate…

With the Hanneman diamond cut grading system, you can derive the cut grade of any round brilliant with minimal measurements and calculations.…