Faceting Design Diagram: Quick Cushion – Beryl – Aquamarine, Emerald, Helidore, Bixbite, Goshenite, Morganite, Golden Beryl


Beryl (Aquamarine, Emerald, Helidore, Bixbite, Goshenite, Morganite, Golden Beryl)

Quick Cushion (MC28.JRG) 1.82 carat Aquamarine
By Jeff R. Graham
Copyright 1999
88.6% Light Return
Angles for R.I. = 1.56
41 facets + 8 facets on girdle = 49
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.561 T/L = 0.561
P/W = 0.513 C/W = 0.174
H/W = (P+C)/W+0.02 = 0.707
P/H = 0.726 C/H = 0.246
Vol./W^3 = 0.304

Addition # 4 – This will work in R.I. 1.56-1.76 with no changes, I designed it for smaller stones, that is why the Pavilion is so simple. Works well in about any material, I use it for earrings, 1/2ct to 4cts. This works in Tourmaline and Topaz.

 

 

 


Random – Cosine – ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler

Gram Faceting Archive of Information
This edited version of an article by the late Jeff Graham is part of a special archived informational series from Gram Faceting. Used with permission.