Faceting Design Diagram: Crystal – Quartz – Citrine, Amethyst, Ametrine, Smokey, Rose


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

Gram Faceting Archive of Information
This edited version of an article by the late Jeff Graham is part of a special archived informational series from Gram Faceting. Used with permission.