Faceting Design Diagram: Pod – Tourmaline – Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite


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

Pod (CHECK1.JRG) 3.0 carat Tourmaline
By Jeff R. Graham
Copyright 2001
88.9% Light Return
Angles for R.I. = 1.62
25 facets + 6 facets on girdle = 31
2-fold, mirror-image symmetry
96 index
L/W = 1.207 T/W = 0.343 T/L = 0.284
P/W = 0.419 C/W = 0.220
H/W = (P+C)/W+0.02 = 0.659
P/H = 0.636 C/H = 0.333
Vol./W^3 = 0.381

Addition # 6 – This is fun and fast… Like a lot of my designs this was created with a particular piece of rough in mind. The rough was green with a pink triangular shaped center. I wanted something that would not mix the colors and show off the fact that the stone was bi-color. This is what I came up with. Notice that the flashes are square, this is also something that I designed for… this works well in almost any material.


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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