Faceting Design Diagram: Straight Pedals – Quartz – Citrine, Amethyst, Ametrine, Smokey, Rose


Quartz (Amethyst, Citrine, Ametrine, Smokey, Rose)

Straight Pedals (QTZ67.JRG)
By Jeff R. Graham
Copyright 1998
76% Light Return
Angles for R.I. = 1.54
55 facets + 6 facets on girdle = 61
6-fold, mirror-image symmetry
96 index
L/W = 1.155 T/W = 0.566 T/L = 0.490
P/W = 0.501 C/W = 0.243
H/W = (P+C)/W+0.02 = 0.764
P/H = 0.655 C/H = 0.319
Vol./W^3 = 0.306

Addition # 3 – This is straight forward to cut. I like to leave the P3 facets frosted for a nice different look. Any good material, 1/2-12cts. Cut in refractive indexes 1.54 to 2.14 (88.1%) with no changes.


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.