PC 13.159

DELTA (INCREMENT OF A VARIABLE)

DESIGNED BY JIM PERKINS
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DataVueopen
L/W
107%
Design RI
1.63
H/W
58%
Gear
96
V/W³
0.153
Symmetry
3 (mirrored)
Facets
34
Tiers
7
Crown
6
Pavilion
28

COPYRIGHT JULY 5, 2002 Average Faceup brilliance ISO=76.1% COS=57.5% @RI=1.63

Here's an easy and fast cutting design that should work without for most materials without angle changes.I had tourmaline in mind though. I would T/R pavilion angles for higher refractive material depending on color saturation. Enjoy it!

Wireframe

DELTA (INCREMENT OF A VARIABLE) 3D view
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Pavilion

#AngleFacetsNotes
G190.00°
141846507882
Level girdle, cut to size.
P149.98°
141846507882
TCP
P248.00°
151747497981
PCP, MP @ girdle.

Crown

#AngleFacetsNotes
C143.53°
141846507882
Cut girdle width,level girdle.
C217.23°
 42836606892
MP @ girdle
C312.00°
326496
MP @ C1 & C2
T0.00°
96
MP @ C1,C2,& C3