French Button: Faceting Design Diagram

Quartz (Amethyst, Citrine, Ametrine, Smokey, Rose)

French Button (CHECK23.JRG)
By Jeff R. Graham
Copyright 2001
86.6% Light Return
Angles for R.I. = 1.54
53 facets + 16 facets on girdle = 69
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.199 T/L = 0.199
P/W = 0.470 C/W = 0.187
H/W = (P+C)/W+0.02 = 0.677
P/H = 0.695 C/H = 0.276
Vol./W^3 = 0.265

Addition # 6 - This is pretty fast and easy to cut… This design works well in refractive indexes 1.54 to 1.93 (91.2%) with no changes. I really like the shape of this stone and it makes great earrings in the 8mm to 10mm size range…

Random - Cosine - ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler