Faceting Design Diagram: Flame of Texas – Tourmaline – Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite


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

Flame of Texas (MIR31.JRG) Citrine cut by Tony Carson
By Jeff R. Graham
Copyright 2004
92.8% Light Return
Angles for R.I. = 1.62
41 facets + 10 facets on girdle = 51
5-fold symmetry
80 index
L/W = 1.051 T/W = 0.307 T/L = 0.292
P/W = 0.414 C/W = 0.198
H/W = (P+C)/W+0.02 = 0.632
P/H = 0.655 C/H = 0.313
Vol./W^3 = 0.217

Addition # 9 – This is fun and works in about any material. I like a large stone because the star can easily be seen. Cut in refractive indexes 1.62 to 2.14 with no changes. Try this in some orange Citrine.

 

 

 


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.