Forums Beginner Questions Round Brilliant For Sunstone? Reply To: Round Brilliant For Sunstone?



I cut a lot of Sunstone. The important thing to remember is that the Critical Angle is 43.5 degrees. I usually bump my SRB Pavilion angles to 45.5/44 for P1/P2 (vice the SRB 42.5/41.5) to enhance any color in the Pavilion.

Here’s a tip I learned from John Bailey at The Faceting Academy in Oregon…

If you have a piece of champagne colored rough that has a small “hint” of color” somewhere inside, place the color as close to the bottom of the pavilion as possible. That really “pops” the color when viewed thru the table.