PC 01.652

JIM's SUPER NOVA

Designed by Jim Perkins, Copyright May 23, 2003
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DataVueopen
L/W
102%
Design RI
1.76
H/W
65%
Gear
72
V/W³
0.234
Symmetry
9 (mirrored)
Facets
109
Tiers
9
Crown
18
Pavilion
91

Average face up brilliance ISO=89.5% COS=78.1% At 10 degrees tilt ISO= 89.2% COS= 78.6%. At 20 degrees tilt ISO= 75.9% COS= 63.9%.

The 72-index teeth are 5 deg. apart. Therefore, designing with adjacent indices isn't as much of a problem as it would be for finer resolution index gears. I have tried to optimize this design for CREATIVE GEMS SC-33 Kashmir Blue Synthetic flame-fusion corundum. I designed it for an 8mm ring stone. It should work nice in most light to medium material RI 1.7+ in sizes 8mm and larger.

Wireframe

JIM's SUPER NOVA 3D view
Top viewSide viewFront viewBack view

Pavilion

#AngleFacetsNotes
G190.00°
 2 610141822263034384246505458626670
Level girdle.
P143.49°
 2 610141822263034384246505458626670
TCP.
P241.49°
 1 7 9151723253133394147495557636571
New TCP, GMP.
P341.00°
 81624324048566472
PCP, New GMP.

Crown

#AngleFacetsNotes
C140.00°
 2 610141822263034384246505458626670
Level girdle.
C235.00°
 81624324048566472
GMP
C322.00°
 41220283644526068
MP @ C1.
C418.00°
 41220283644526068
MP @ C2.
T0.00°
72
Cut to size.