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"

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HomeLearning CenterJewelry and LapidaryGemstone Faceting Diagrams and Technical Cutting InformationAcorn Tri: Faceting Design Diagram
By Jeff R. Graham

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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