Tourmaline Terror

by Arya Akhavan (March 2014)
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Gemology Projectopen
L/W
109%
Design RI
1.52
H/W
61%
Gear
96
V/W³
0.201
Symmetry
3 (mirrored)
Facets
67
Tiers
15
Crown
25
Pavilion
42

This design was random experiment while trying to design an Asscher-style trillion, and it's perfectly shaped for cutting tourmalines on the C axis. Can also be cut (P3 - P4 - G1 - G2 - P1 - P2), and has tons of scintillation. Works in materials from quartz to rutile (RI = 1.54 - 2.62) with no changes, but intended for tourmaline. Suggested size = 7-20 mm

Wireframe

Tourmaline Terror 3D view
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Pavilion

#AngleFacetsNotes
G190.00°
164880
Set stone size.
G290.00°
131945517783
Meet P1, P2, G1
G390.00°
963264
Level girdle.
P345.84°
164880
Level girdle.
P144.33°
151747497981
Cut to centerpoint.
P444.04°
131945517783
Level girdle.
P243.74°
141846507882
Meet at culet.
P642.25°
963264
Meet G2, P4, P5
P541.58°
112143537585
Meet P2, P4

Crown

#AngleFacetsNotes
C155.32°
164880
Set girdle width.
C242.27°
131945517783
Level girdle.
C336.61°
963264
Level girdle.
C434.42°
122044527684
Meet G2, G3, C2, C3; C1, C2
C519.53°
 82440567288
Meet C3, C4
T0.00°
24
Meet C4, C5