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

Gram Faceting Archive of Information
This edited version of an article by the late Jeff Graham is part of a special archived informational series from Gram Faceting. Used with permission.