Faceting Design Diagram: Elizabeth’s Flash – Tourmaline – Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite

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

Elizabeth’s Flash (CHECK20.JRG) 19.89 carat Tourmaline
By Jeff R. Graham
Copyright 2001
89.5% Light Return
Angles for R.I. = 1.62
27 facets + 4 facets on girdle = 31
2-fold, mirror-image symmetry
96 index
L/W = 1.200 T/W = 0.320 T/L = 0.267
P/W = 0.466 C/W = 0.231
H/W = (P+C)/W+0.02 = 0.717
P/H = 0.650 C/H = 0.322
Vol./W^3 = 0.489

Addition # 6 – This is designed to be deep for high yield return… I originally had a tri-colored crystal-shaped piece of Tourmaline rough that I designed this for. It was such an unusual piece of rough and I did not want to waste any of it. This works well in about any color, I particularly like it in multi-colored Tourmaline. It will tend to darken a bit…

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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