Speed Demon

by Arya Akhavan (December 2014)
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Gemology Projectopen
L/W
104%
Design RI
1.54
H/W
54%
Gear
96
V/W³
0.144
Symmetry
3 (mirrored)
Facets
31
Tiers
7
Crown
13
Pavilion
18

I was messing around with some ring concept designs, and I decided that I really wanted some triangular accent stones. This quick little design is great for that purpose; it cuts extremely quickly, doesn't take any complicated effort to establish the girdle outline, and still holds a lot of visual appeal. Works in materials from quartz to CZ (RI = 1.54 - 2.16) with no changes.

Wireframe

Speed Demon 3D view
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Pavilion

#AngleFacetsNotes
G190.00°
131945517783
Set stone size.
P143.00°
131945517783
Cut to centerpoint.
P242.30°
141846507882
Meet P1, G1

Crown

#AngleFacetsNotes
C135.00°
131945517783
Set girdle width.
C232.42°
164880
Meet G1, C1
C319.36°
963264
Meet G1, C1
T0.00°
24
Meet C1, C2, C3