TB: Faceting Design Diagram

Successful tips, details and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "TB".


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

"TB" (B31.JRG)
By Jeff R. Graham
Copyright 2001
84.2% Light Return
Angles for R.I. = 1.56
55 facets + 8 facets on girdle = 63
2-fold, mirror-image symmetry
96 index
L/W = 1.200 T/W = 0.729 T/L = 0.608
P/W = 0.620 C/W = 0.158
H/W = (P+C)/W+0.02 = 0.799
P/H = 0.777 C/H = 0.198
Vol./W^3 = 0.423

Addition # 5 - Notice when you cut the L/W=1.20 and the P1 tier it will meet at 96-24- 48-72. There are only four girdle facets for speed and yield. This will work in any R.I. from 1.54 to 1.76 (89.8%) with no changes.



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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