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


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

Spike (MC47.JRG)
By Jeff R. Graham
Copyright 2001
93.1% Light Return
Angles for R.I. = 1.54
19 facets + 4 facets on girdle = 23
2-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.305 T/L = 0.305
P/W = 0.307 C/W = 0.106
H/W = (P+C)/W+0.02 = 0.434
P/H = 0.709 C/H = 0.245
Vol./W^3 = 0.092

Addition # 7 – This is very nice, simple, and fast. I use it for about any type of rough, although I prefer medium saturation. This is great for earrings and is similar to my “Light House” cut.


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.