9 By Check Round: Faceting Design Diagram

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

9 By Check Round (MC2.JRG)
By Jeff R. Graham
Copyright 1999
92.8% Light Return
Angles for R.I. = 1.54
33 facets + 12 facets on girdle = 45
2-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.268 T/L = 0.268
P/W = 0.435 C/W = 0.209
H/W = (P+C)/W+0.02 = 0.664
P/H = 0.655 C/H = 0.315
Vol./W^3 = 0.224

Addition # 4 - This cuts fast and easy, be careful that the stone is round or the top will not meet. This works well in about any material, but I like it for darker stones to help make them brighter, 1-12cts. Works in Tourmaline and Topaz too… Cut this in R.I. 1.54 to 1.76 without changes.

Random - Cosine - ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler