Crystal: Faceting Design Diagram

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

Crystal (CHECK29.JRG)
By Jeff R. Graham
Copyright 2001
90.6% Light Return
Angles for R.I. = 1.54
27 facets + 8 facets on girdle = 35
2-fold, mirror-image symmetry
96 index
L/W = 1.497 T/W = 0.351 T/L = 0.235
P/W = 0.451 C/W = 0.205
H/W = (P+C)/W+0.02 = 0.675
P/H = 0.667 C/H = 0.303
Vol./W^3 = 0.505

Addition # 6 - This is made for those rather narrow long Tourmaline crystals. This is good for dark ends and darker colors. I left it in refractive index 1.54 for Quartz, although I usually use this design for Tourmaline. The L/W of this can float longer or shorter without causing any problems.

Random - Cosine - ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler