Faceting Design Diagram: Mock Check Square – Quartz – Citrine, Amethyst, Ametrine, Smokey, Rose

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

Mock Check Square (MC4.JRG) Tourmaline cut by Tony Carson
By Jeff R. Graham
Copyright 1999
79.4% Light Return
Angles for R.I. = 1.54
16 facets + 4 facets on girdle = 20
2-fold, mirror-image symmetry
96 index
L/W = 1.000 P/W = 0.489 C/W = 0.158
H/W = (P+C)/W+0.02 = 0.668
P/H = 0.733 C/H = 0.237
Vol./W^3 = 0.351

Addition # 4 – In R.I. Tourmaline/Topaz this is 84%. This cuts fast, just cut the steps as even as you can. There are no meets, this is very easy to cut. It makes nice earrings, I like it in lighter materials, the checker flash is great, 1/2ct+. Cut this in R.I. 1.54 to 1.76 (88.3%) without 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.