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


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

Diamonds Up (MIR3.JRG)
By Jeff R. Graham
Copyright 2004
92.9% Light Return
Angles for R.I. = 1.54
29 facets + 8 facets on girdle = 37
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.304 T/L = 0.304
P/W = 0.435 C/W = 0.229
H/W = (P+C)/W+0.02 = 0.684
P/H = 0.635 C/H = 0.335
Vol./W^3 = 0.266

Addition # 9 – Note: The corners do not cut to center point. This design is made so the corners can vary depending on rough. Just eyeball the P3(G) in until it looks right. This cuts fast and works well in any light to medium saturated material. Cut this in refractive index 1.54 to 2.14 with no changes.


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.