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

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

Point Square Check – Reflector (MC3.JRG)
By Jeff R. Graham
Copyright 1999
88.5% Light Return
Angles for R.I. = 1.54
24 facets + 4 facets on girdle = 28
2-fold, mirror-image symmetry
96 index
L/W = 1.000 P/W = 0.435 C/W = 0.225
H/W = (P+C)/W+0.02 = 0.679
P/H = 0.640 C/H = 0.331
Vol./W^3 = 0.292

Addition # 4 – This is fun to cut, and fast too. I like to cut this in dark Amethyst, it works well in sizes up to about 10mm for earrings. When setting the corners need to be protected, I usually just nick and polish them, so they are not sharp. This works well in Tourmaline and Topaz. Cut this in R.I. 1.54 to 2.14 (90.7%) 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.