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


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

Circus Star Jeff Graham Facet Design 1 Circus Star Jeff Graham Facet Design 2

Circus Star (DOME12.JRG)
By Jeff R. Graham
Copyright 2007
87.7% Light Return
Angles for R.I. = 1.62
73 facets + 8 facets on girdle = 81
8-fold symmetry
96 index
L/W = 1.000 T/W = 0.321 T/L = 0.321 P/W = 0.415
C/W = 0.350 H/W = (P+C)/W+0.02 = 0.785 P/H = 0.529 C/H = 0.446 Vol./W^3 = 0.310

Addition # 13 – Cut in refractive indexes 1.62 to 2.14 with no changes. This is designed for lightly saturated rough and works best in pastel colors. I designed this for nodule shaped material.

Circus Star Jeff Graham Facet Design 3

Detailed faceting instructions by Jeff Graham available at The Rock Peddler