Opposed Beryl : Faceting Design Diagram
Helpful tips, details and guide on Faceting Designs.Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Opposed Beryl"0
Opposed Beryl (MC10.JRG)
By Jeff R. Graham
82% Light Return
Angles for R.I. = 1.56
25 facets + 12 facets on girdle = 37
2-fold, mirror-image symmetry
L/W = 2.000 T/W = 0.917 T/L = 0.458
H/W = 0.732
Vol./W^3 = 0.751
Addition # 4 - This can be hard to cut the first time. It is a variation on the Vargas opposed bar. I designed it for longer narrow crystals (Tourmaline, Beryl). Establishing the proper L/W with a preform is a good idea. Cut the girdle facets as evenly as you can into thirds, you will probably have to do some adjusting to get this one finished, but it is well worth it. This works well in Tourmaline, and Topaz... Cut this in R.I. 1.56 to 2.14 (86.5%) without changes.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
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