Deflexion: 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 "Deflexion".


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

Deflexion (MIR41.JRG)
By Jeff R. Graham
Copyright 2004
86.8% Light Return
Angles for R.I. = 1.54
46 facets + 9 facets on girdle = 55
3-fold, mirror-image symmetry
96 index
L/W = 1.004 T/W = 0.348 T/L = 0.346
P/W = 0.387 C/W = 0.169
H/W = (P+C)/W+0.02 = 0.576
P/H = 0.671 C/H = 0.294
Vol./W^3 = 0.174

Addition # 9 - This is interesting and cuts fairly fast. It works well in about any material. Cut in refractive indexes 1.54 to 2.14 with no changes. I like this in Sapphire, especially light to medium colors.




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.

Never Stop Learning

When you join the IGS community, you get trusted diamond & gemstone information when you need it.

Become a Member

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!