W. William Hanneman, Ph.D. is a retired research analytical chemist. Gemology is his hobby. He has authored several books, guides, and toolsets based on his unique chemistry based perspective on gemology.
Articles by William Hanneman
Evaluating Diamond Cuts: The Hanneman Diamond Cut Grading System, Lesson Four
The Hanneman System makes evaluating diamond cuts easier. You can use total height and C/P ratios to cut grade round...
Cut Diamond Grade Categories: The Hanneman Diamond Cut Grading System, Lesson Three
The Hanneman System simplifies cut diamond grade categories. Learn how to identify the worst cut stones quickly before taking unnecessary...
Basic Diamond Proportions: The Hanneman Diamond Cut Grading System, Lesson Two
In the Hanneman cut grading system, you must consider diamond proportions to grade a round brilliant stone. Learn what they...
An Introduction to the Hanneman Diamond Cut Grading System, Lesson One
With the Hanneman diamond cut grading system, you can derive the cut grade of any round brilliant with minimal measurements...