Faceting Design Diagram: 4-Way Stop Cushion – Garnet – Pyrope, Rhodolite, Almandine, Spessartite, Grossular, Demantoid, Tsavorite

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

4-Way Stop Cushion (CHECK4.JRG)
By Jeff R. Graham
Copyright 2000
86.4% Light Return
Angles for R.I. = 1.73
59 facets + 16 facets on girdle = 75
2-fold, mirror-image symmetry
72 index
L/W = 1.207 T/W = 0.405 T/L = 0.336
P/W = 0.470 C/W = 0.263
H/W = (P+C)/W+0.02 = 0.753
P/H = 0.624 C/H = 0.349
Vol./W^3 = 0.357

Addition # 6 – The crown on this can be tough to cut if your L/W is not right. It does take some cheating (like most checkerboard tops). This has very nice light return and has a fairly low number of facets. It works well in Spinel, Sapphire, Peridot and man-made materials.

Random – Cosine – ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler

Gram Faceting Archive of Information
This edited version of an article by the late Jeff Graham is part of a special archived informational series from Gram Faceting. Used with permission.