Strip “O”: Faceting Design Diagram

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

Strip "O" (QTZ41.JRG)
By Jeff R. Graham
Copyright 1995
74% Light Return
Angles for R.I. = 1.54
59 facets + 12 facets on girdle = 71
2-fold, mirror-image symmetry
96 index
L/W = 1.200 T/W = 0.614 T/L = 0.512
P/W = 0.485 C/W = 0.236
H/W = (P+C)/W+0.02 = 0.741
P/H = 0.655 C/H = 0.318
Vol./W^3 = 0.343

Gram Book 1 - This oval is nice to cut, but it is a lot of work, like most ovals. The P11 facets are not center point and should be cut until they are parallel to each other. Cut it in any light to medium material, 1-12cts. Cut in refractive index 1.54 to 1.93 (80.6%) with no changes.

Random - Cosine - ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler