Radiant Barion Pear: Faceting Design Diagram

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

Jeff R. Graham

The late Jeff Graham was a prolific faceter, creator of many original faceting designs, and the author of several highly-regarded instructional faceting books such as Gram Faceting Designs.

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