Equal: Faceting Design Diagram
Detailed information and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Equall".
Beryl (Aquamarine, Emerald, Helidore, Bixbite, Goshenite, Morganite, Golden Beryl)
Equal (B38.JRG)
By Jeff R. Graham
Copyright 2001
82.2% Light Return
Angles for R.I. = 1.56
49 facets + 9 facets on girdle = 58
3-fold, mirror-image symmetry
96 index
L/W = 1.010 T/W = 0.500 T/L = 0.495
P/W = 0.508 C/W = 0.169
H/W = (P+C)/W+0.02 = 0.697
P/H = 0.729 C/H = 0.242
Vol./W^3 = 0.260
Addition # 5 - This can be cut with no changes in 1.56 to 1.93 and the performance is almost identical. This cuts fast and easy. It's a good design for a new cutter.
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.
Related Articles
Aquamarine Value, Price, and Jewelry Information
Emerald Value, Price, and Jewelry Information
Seven Famous Emeralds and Their Stories
Emerald Origins: History and Identification
Latest Articles
Traditional Diamond Cut Grading Methods
Cutting a 294-ct Trilliant Morganite: An Interview with Steve Moriarty
Tourmaline Engagement Ring Stones: the Ultimate Guide
Chabazite Value, Price, and Jewelry Information
Never Stop Learning
When you join the IGS community, you get trusted diamond & gemstone information when you need it.
Get Gemology Insights
Get started with the International Gem Society’s free guide to gemstone identification. Join our weekly newsletter & get a free copy of the Gem ID Checklist!