Repose: Faceting Design Diagram

Sunstone (Feldspar, Bytonite, Labradorite, Spectrolite, Orthoclase)

Repose (SUN20.JRG)
By Jeff R. Graham
Copyright 2006
87.4% Light Return
Angles for R.I. = 1.54
73 facets + 8 facets on girdle = 81
8-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.609 T/L = 0.609 P/W = 0.557
C/W = 0.141 H/W = (P+C)/W+0.02 = 0.718 P/H = 0.775 C/H = 0.197 Vol./W^3 = 0.296

PAVILION

CROWN

Addition # 11 - Cut in refractive indexes 1.54 to 2.14 with no changes. This is excellent in about any colored material and works well in Beryl. It cuts fairly easy and fast I prefer lightly saturated materials. Note: The girdle can be cut in first and the P1 cut to meet so that center point is not needed and it saves rough.

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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