Blue Star: Faceting Design Diagram
Detailed information and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Blue Star".
Topaz (Swiss, Electric, London Blue, Imperial, White, Yellow, Pink, Champange)
Blue Star (TOPAZ3.JRG)
By Jeff R. Graham
82.5% Light Return
Angles for R.I. = 1.62
67 facets + 6 facets on girdle = 73
6-fold, mirror-image symmetry
96 index L/W = 1.155 T/W = 0.562 T/L = 0.486
P/W = 0.459 C/W = 0.213
H/W = (P+C)/W+0.02 = 0.692
P/H = 0.663 C/H = 0.308
Vol./W^3 = 0.279
Gram Book 1 - Here is a good design for Topaz with sparkle that is easy to cut. It makes good earrings especially in blue material, 1/2-6cts. Cut in refractive index 1.62 to 2.14 (87.9%) with no changes.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
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