Lens: 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 "Lens".

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

Lens Jeff Graham Facet Design 1Lens Jeff Graham Facet Design 2

Lens (DOME4.JRG)
By Jeff R. Graham
Copyright 2007
80.6% Light Return
Angles for R.I. = 1.62
133 facets + 12 facets on girdle = 145
12-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.294 T/L = 0.294 P/W = 0.419
C/W = 0.295 H/W = (P+C)/W+0.02 = 0.734 P/H = 0.571 C/H = 0.402 Vol./W^3 = 0.277

PAVILION

CROWN

Addition # 13 - Cut this in refractive indexes 1.62 to 2.14 with no changes. This is an interesting cut and works well in any light to medium saturated material. This is not hard to cut.

Lens Jeff Graham Facet Design 3

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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