Faceting Design Diagram: Radiant Barion Pear – Quartz – Citrine, Amethyst, Ametrine, Smokey, Rose


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

Radiant Barion Pear (B37.JRG)
By Jeff R. Graham
Copyright 2001
84% Light Return
Angles for R.I. = 1.54
64 facets + 16 facets on girdle = 80
1-fold, mirror-image symmetry
96 index
L/W = 1.436 T/W = 0.878 T/L = 0.611
P/W = 0.608 C/W = 0.186
H/W = (P+C)/W+0.02 = 0.814
P/H = 0.747 C/H = 0.228
Vol./W^3 = 0.424

Addition # 5 – This works in R.I. 1.54 to 1.76 (86.6%) with no changes. This design is a lot of work to cut and not for a new cutter. Preform L/W=1.436 is needed to make this work. Other than a lot of work it is not especially hard. I designed this for light materials and large sized stones.


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.