Zip: 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 "Zip".


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

Zip (MC49.JRG)
By Jeff R. Graham
Copyright 2001
89.4% Light Return
Angles for R.I. = 1.54
15 facets + 4 facets on girdle = 19
1-fold symmetry
96 index
L/W = 1.000 T/W = 0.656 T/L = 0.656
P/W = 0.462 C/W = 0.099
H/W = (P+C)/W+0.02 = 0.581
P/H = 0.795 C/H = 0.171
Vol./W^3 = 0.220

Addition # 7 - This is a design made for accent stones. The best way to cut this is to cut a square girdle first. When I say edge on P4(G), I mean cut to the long edge. The best way to do it is cut until the P4(G)just meets 72 index (cutting the pavilion). This is actually pretty easy and works great for 1.54 to 1.93 with no changes. I like it cut in red Garnet.


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!