Glitter 88: Faceting Design Diagram

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

Glitter 88 (MC90.JRG)
By Jeff R. Graham
Copyright 2003
81.3% Light Return
Angles for R.I. = 1.62
121 facets + 8 facets on girdle = 129
8-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.482 T/L = 0.482 P/W = 0.466
C/W = 0.209 H/W = (P+C)/W+0.02 = 0.695 P/H = 0.671 C/H = 0.300 Vol./W^3 = 0.258

PAVILION

CROWN

Addition # 12 - Cut in refractive indexes 1.62 to 2.14 (90.5%) with no changes. This works well in light to medium saturated materials. Rough in the table and then cut the stars, it make the meets easier.

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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