Faceting Design Diagram: Tess’s Pentagram – Quartz – Citrine, Amethyst, Ametrine, Smokey, Rose


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

Tess’s Pentagram (MC71.JRG) Ametrine
By Jeff R. Graham
Copyright 2002
82.6% Light Return
Angles for R.I. = 1.54
23 facets + 5 facets on girdle = 28
1-fold, mirror-image symmetry
96 index
L/W = 1.282 T/W = 0.820 T/L = 0.640
P/W = 0.396 C/W = 0.175
H/W = (P+C)/W+0.02 = 0.591
P/H = 0.670 C/H = 0.296
Vol./W^3 = 0.256

Addition # 7 – This is not all that tough to cut, although it is not really meet point. Cut a L/W=1.282 preform, which is why I have you cut the girdle first. Cut P1 to the length you think it should be depending on the rough. Then alternate P2(G),P3(G)to get it to the L/W. Notice that by doing it this way it will set the outline shape. If you are off a little, it is not a problem, you may need to tweak the crown a little. This works in Beryl…..


Random – Cosine – ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler

About the author
Jeff R. Graham
The late Jeff Graham was a prolific faceter, creator of many original faceting designs, and the author of several highly-regarded instructional faceting books such as Gram Faceting Designs.
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