Long Horn: Faceting Design Diagram
Successful tips and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Long Horn".
Zircon (Hyacinth, Starlite)
Long Horn (ZIRCON16.JRG)
By Jeff R. Graham
Copyright 1998
77% Light Return
Angles for R.I. = 1.98
85 facets + 12 facets on girdle = 97
2-fold, mirror-image symmetry
96 index
L/W = 1.330 T/W = 0.469 T/L = 0.352
P/W = 0.437 C/W = 0.252
H/W = (P+C)/W+0.02 = 0.710
P/H = 0.616 C/H = 0.355
Vol./W^3 = 0.316
Addition # 3 -This is hard to cut and should be in a larger size, it works well in CZ also. It should be cut in a large size because of the number of facets and meets. Light to medium color material,2-24cts.
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
Zircon Value, Price, and Jewelry Information
How Old Is My Zircon?
Zircon Engagement Ring Guide
Zircon Sources
Latest Articles
Serandite Value, Price, and Jewelry Information
A Beginner’s Guide To Common Gemstone Heat Treatments
Gemstone Radiation Treatment
Alternative Birthstones
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!