Al Gilbertson article about cut and appearance of gems

[Garry H (Cut Nut)]

"PART 3 OF 5 IN THE SERIES: VALUE FACTORS, DESIGN, AND CUT QUALITY OF COLORED GEMSTONES (NON-DIAMOND)"
It has relevance to diamonds too IMHO
https://www.gia.edu/gia-news-resear...Xek1nQXN3N0lZc1VFY3M4ckZrRzlCcGFOTENKYVE9PSJ9
Note the link to Bruce Harding who (passed away earlier this year) and posted a lot in Rocky Talky. He wrote the bible on how to work out proportions for colored gems. Look him up!

 

[suzanne2]

Thank you for an excellent article on cutting colored gems. I enjoyed the fact that thousands of cutting diagrams were posted "Some years back, an effort was made to collect GemCad generated diagrams (cutting plans) into a database" . This is awesome. Akin to the lady who shares every scholarly dissertation for free. Kudos.

 

[Garry H (Cut Nut)]

Thank you for an excellent article on cutting colored gems. I enjoyed the fact that thousands of cutting diagrams were posted "Some years back, an effort was made to collect GemCad generated diagrams (cutting plans) into a database" . This is awesome. Akin to the lady who shares every scholarly dissertation for free. Kudos.

If you poke around in Projects on this site you will find a lot of detail
https://www.octonus.com/projects/diamond-cuts-gallery