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

Keely Cisor (MC19.JRG)
By Jeff R. Graham
Copyright 1999
84% Light Return
Angles for R.I. = 1.62
37 facets + 8 facets on girdle = 45
2-fold, mirror-image symmetry
96 index
L/W = 1.330 T/W = 0.833 T/L = 0.626
P/W = 0.466 C/W = 0.131
H/W = (P+C)/W+0.02 = 0.618
P/H = 0.755 C/H = 0.213
Vol./W^3 = 0.440

Addition # 4 - The 24/72 index float, the P7's can be adjusted for yield. A preform is a very good idea, this is not an easy cut, especially the first time. it works well in lighter materials, 1cts+. Works in Topaz also... Cut this in R.I. 1.62 to 2.14 (84.6%) without changes.

 

 

 

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