Faceting Design Diagram: Glitter Mine #2 – Tourmaline, Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite

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

Glitter Mine2_jeff_graham_facet_design1

Glitter Mine2_jeff_graham_facet_design2

Glitter Mine #2 (MC89.JRG)
By Jeff R. Graham
Copyright 2003
87.6% Light Return
Angles for R.I. = 1.62
129 facets + 8 facets on girdle = 137
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.474 T/L = 0.474 P/W = 0.508
C/W = 0.188 H/W = (P+C)/W+0.02 = 0.717 P/H = 0.709 C/H = 0.263 Vol./W^3 = 0.297

Addition # 12 – Cut in refractive indexes 1.62 to 2.14 with no changes. This works well in light to medium saturated material and needs to be a large stone. Rough in the table before cutting the star facets makes the meet easier.

Glitter Mine#2 Jeff Graham Facet Design

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.
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