Faceting Design Diagram: Pent Split – Garnet – Pyrope, Rhodolite, Almandine, Spessartite, Grossular, Demantoid, Tsavorite


Garnet (Pyrope, Rhodolite, Almandine, Spessartite, Grossular, Demantoid, Tsavorite)

Pent Split (GNETP36.JRG)
By Jeff R. Graham
Copyright 1997
86.2% Light Return
Angles for R.I. = 1.73
51 facets + 5 facets on girdle = 56
5-fold, mirror-image symmetry
80 index
L/W = 1.051 T/W = 0.537 T/L = 0.511
P/W = 0.424 C/W = 0.151
H/W = (P+C)/W+0.02 = 0.595
P/H = 0.713 C/H = 0.253
Vol./W^3 = 0.196

Addition # 3 – This design cuts pretty simple. It works well in about any type of medium colored Garnet, 1-6cts. Cut in refractive indexes 1.73 to 1.93 with no changes.


Random – Cosine – ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler