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
Can You Identify Gems Without Seeing Gemstone Colors?
How Old Is My Zircon?
Natural Radiation and Gemstone Color
Latest Articles
800 Years of Mogok: A Celebration in Tenuous Times
What is the Average Gemstone Faceting Yield?
Pyroxmangite Value, Price, and Jewelry Information
How to Identify Emerald Simulants and Synthetics
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!