Diamonds Up: Faceting Design Diagram

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

Diamonds Up (CHECK21.JRG)
By Jeff R. Graham
Copyright 2001
80.5% Light Return
Angles for R.I. = 1.54
81 facets + 16 facets on girdle = 97
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.394 T/L = 0.394
P/W = 0.528 C/W = 0.180
H/W = (P+C)/W+0.02 = 0.727
P/H = 0.725 C/H = 0.247
Vol./W^3 = 0.295

Addition # 6 - This can be cut in refractive indexes 1.54 to 1.93 with no changes. This should be cut in a light to medium colored material as it will darken a bit.

Random - Cosine - ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler