Ceylon Blues: 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 "Ceylon Blues"
Ceylon Blues (MC56.JRG)
By Jeff R. Graham
82.7% Light Return
Angles for R.I. = 1.76
65 facets + 12 facets on girdle = 77
4-fold, mirror-image symmetry
L/W = 1.000 T/W = 0.500 T/L = 0.500
P/W = 0.478 C/W = 0.176
H/W = (P+C)/W+0.02 = 0.674
P/H = 0.709 C/H = 0.262
Vol./W^3 = 0.280
Addition # 7 - The P5 establishes the P6(G) girdle corners by cutting to meet P3, P4 junction. You can save rough by just letting the corners float in… Doing it this way will make the crown slightly different, but will cause no problems. This is designed for re-cutting native cut Sapphires. I have made this design a mixed cut (like the native cuts) to help with yield and the brilliant crown increases sparkle. This design will probably darken most Sapphires a bit.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
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