Fanned Triangle: 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 "Fanned Triangle".
Quartz (Amethyst, Citrine, Ametrine, Smokey, Rose)
Fanned Triangle (QTZ40.JRG)
By Jeff R. Graham
Copyright 1994
88.3% Light Return
Angles for R.I. = 1.54
52 facets + 15 facets on girdle = 67
3-fold, mirror-image symmetry
96 index
L/W = 1.028 T/W = 0.303 T/L = 0.295
P/W = 0.392 C/W = 0.213
H/W = (P+C)/W+0.02 = 0.625
P/H = 0.627 C/H = 0.341
Vol./W^3 = 0.211
Addition # 1 - This design is fairly hard to cut and takes some work and attention to detail. Cut in refractive indexes 1.54 to 1.93 with no changes. Light material makes the best stone, 1-12cts.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
