Quark: Faceting Design Diagram
Successful tips, details, and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Quark".
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
By Jeff R. Graham
87% Light Return
Angles for R.I. = 1.62
37 facets + 16 facets on girdle = 53
4-fold, mirror-image symmetry
L/W = 1.000 T/W = 0.245 T/L = 0.245 P/W = 0.434
C/W = 0.249 H/W = (P+C)/W+0.02 = 0.703 P/H = 0.618 C/H = 0.354 Vol./W^3 = 0.250
Addition # 10 - Cut in refractive indexes 1.62 to 1.76 with no changes. This is designed for lightly saturated materials. I designed it for some pastel Afghan Tourmaline. It cuts fairly easy and works in about any size. I prefer sizes over 6mm. Note: P5 is cut short and just floats, the tier is not critical. It is done that way to add some interest to the flash, it makes "V" reflections. You can cut it to center point if you wish.
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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