Asterism Revisited: Faceting Design Diagram

Information and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Asterism Revisited".


Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)

Asterism Revisited Jeff Graham Facet Design 1Asterism Revisited Jeff Graham Facet Design 2

Asterism Revisited (DOME10.JRG)
By Jeff R. Graham
Copyright 2007
87.7% Light Return
Angles for R.I. = 1.62
145 facets + 12 facets on girdle = 157
12-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.309 T/L = 0.309 P/W = 0.405
C/W = 0.336 H/W = (P+C)/W+0.02 = 0.761 P/H = 0.532 C/H = 0.441 Vol./W^3 = 0.288



Addition # 13 - Cut this in refractive indexes 1.62 to 2.14 with no changes. This is not hard to cut, but takes a while. Lightly saturated materials work best.

Asterism Revisited Jeff Graham Facet Design 3

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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