Spiral Sun: Faceting Design Diagram
Details, Helpful tips and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Spiral Sun"
Quartz (Amethyst, Citrine, Ametrine, Smokey, Rose)
Spiral Sun (MIR66.JRG)
By Jeff R. Graham
Copyright 2005
91.9% Light Return
Angles for R.I. = 1.54
33 facets + 8 facets on girdle = 41
8-fold symmetry
96 index
L/W = 1.000 T/W = 0.367 T/L = 0.367 P/W = 0.435 C/W = 0.240 H/W = (P+C)/W+0.02 = 0.695 P/H = 0.625 C/H = 0.346 Vol./W^3 = 0.241
PAVILION
CROWN
Addition # 10 - This is another good earring design for lightly saturated materials. This is easy and fast to cut. I like it in Rose de France. Cut in refractive indexes 1.54 to 2.14 with not changes.
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
Rose Quartz Value, Price, and Jewelry Information
Ametrine Value, Price, and Jewelry Information
Amethyst Value, Price, and Jewelry Information
Citrine Value, Price, and Jewelry Information
Latest Articles
Precision Faceting a Story Gemstone: Choosing Rough
32 Green Gemstones (How Many Do You Know?)
A Guide to Antique Georgian Jewelry
Hambergite Value, Price, and Jewelry Information
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!