Prop: Faceting Design Diagram

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

Prop (MC31.JRG)
By Jeff R. Graham
Copyright 1999
93.2% Light Return
Angles for R.I. = 1.54
25 facets + 8 facets on girdle = 33
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.351 T/L = 0.351
P/W = 0.458 C/W = 0.173
H/W = (P+C)/W+0.02 = 0.651
P/H = 0.704 C/H = 0.265
Vol./W^3 = 0.256

Addition # 4 - The corners on this are totally floating and can be cut to whatever size you need to optimize your rough with-out affecting the crown. This works well in medium to darker material, I use it for earrings, 1/2-6cts. This works in Tourmaline and Topaz. Cut this in R.I. 1.54 to 1.76 (89.9%) without changes.

Random - Cosine - ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler