Acorn Tri: Faceting Design Diagram

Detailed information and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Acorn Tri"


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

Acorn Tri (QTZ60.JRG)
By Jeff R. Graham
Copyright 1997
74% Light Return
Angles for R.I. = 1.54
70 facets + 6 facets on girdle = 76
3-fold, mirror-image symmetry
96 index
L/W = 1.073 T/W = 0.532 T/L = 0.496
P/W = 0.457 C/W = 0.166
H/W = (P+C)/W+0.02 = 0.643
P/H = 0.710 C/H = 0.259
Vol./W^3 = 0.223

Addition # 3 - The P8 can be left off on a smaller stone. There are no real meets on the P6,P7 tiers be careful. This is a little harder to cut than normal and may take a couple of times to get right, 1-12cts. Cut in refractive indexes 1.54 to 1.76 (80.6%) with no changes.



Random - Cosine - ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler

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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