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


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

Golden Scale (MC84.JRG)
By Jeff R. Graham
Copyright 1998
75.8% Light Return
Angles for R.I. = 1.62
33 facets + 5 facets on girdle = 38
1-fold, mirror-image symmetry
96 index
L/W = 1.048 T/W = 0.698 T/L = 0.666
P/W = 0.371 C/W = 0.127
H/W = (P+C)/W+0.02 = 0.518
P/H = 0.715 C/H = 0.246
Vol./W^3 = 0.161

Addition # 7 – This is quite nice and not as hard to cut as it may look. It is important to have the correct L/W=1.048 and the rest will cut in fairly easily. This works well in about 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.
All articles by this author