Handy Cushion: Faceting Design Diagram
Successful tips and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Handy Cushion".0
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Handy Cushion (B26.JRG)
By Jeff R. Graham
87.1% Light Return
Angles for R.I. = 1.62
65 facets + 12 facets on girdle = 77
2-fold, mirror-image symmetry
L/W = 1.200 T/W = 0.682 T/L = 0.568
P/W = 0.525 C/W = 0.186
H/W = (P+C)/W+0.02 = 0.731
P/H = 0.718 C/H = 0.254
Vol./W^3 = 0.374
Addition # 5 - I cut a lot of cushions, and there seems to be a lack of high quality fast ones that are fast to cut. The breaks can be cut in another order, also notice the C8 does not have a meet at the girdle. This is to absorb a little if your L/W is off. This can be cut in R.I 1.62 to 1.93 (89.3%) with no changes.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
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