Quell: 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 "Quell".0
By Jeff R. Graham
77.4% Light Return
Angles for R.I. = 1.54
73 facets + 16 facets on girdle = 89
8-fold, mirror-image symmetry
L/W = 1.000 T/W = 0.467 T/L = 0.467 P/W = 0.548
C/W = 0.148 H/W = (P+C)/W+0.02 = 0.716 P/H = 0.765 C/H = 0.207 Vol./W^3 = 0.270
Addition # 11 - Cut in refractive indexes 1.54 to 2.14 with no changes. This is designed to be a deeper RB. It works well in any colored material and is particularly good in Beryl. This is also nice in large yellow Sunstone. Note: The girdle can be cut in first and the P1 cut to meet so that center point is not needed and it saves rough.
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
Bytownite Value, Price, and Jewelry Information
Orthoclase Value, Price, and Jewelry Information
Feldspar Value, Price, and Jewelry Information
Labradorite Value, Price, and Jewelry Information
Topaz Buying Guide
Gemstone Refractometer Mini-Quiz
What is Gemstone Luminescence?
Sarcolite Value, Price, and Jewelry Information
When you join the IGS community, you get trusted diamond & gemstone information when you need it.
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!