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

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

Zipidy Do Jeff Graham Facet Design Zipidy Do Jeff Graham Facet Design

Zippidy Do (MC104.JRG)
By Jeff R. Graham
Copyright 2006
86.7% Light Return
Angles for R.I. = 1.62
118 facets + 12 facets on girdle = 130
3-fold, mirror-image symmetry
96 index
L/W = 1.037 T/W = 0.596 T/L = 0.574 P/W = 0.457
C/W = 0.153 H/W = (P+C)/W+0.02 = 0.630 P/H = 0.725 C/H = 0.243 Vol./W^3 = 0.228

Addition # 12 – Cut in refractive indexes 1.62 to 2.14 (91.2%) with no changes. This is not all that hard to cut and works best in light to medium saturated materials. I designed it for a large light pink Tourmaline.

Zipidy Do Jeff Graham Facet Design

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.