Glitter Mine #2: Faceting Design Diagram
Successful tips and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Mine #2".
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
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
PAVILION
CROWN
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.
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
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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