Triphane Triangle

by Arya Akhavan (August 2013)
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Gemology Projectopen
L/W
107%
Design RI
1.65
H/W
64%
Gear
96
V/W³
0.185
Symmetry
3 (mirrored)
Facets
70
Tiers
14
Crown
31
Pavilion
39

For some reason, I really like putting triangles inside of triangles, and building triangles from other triangles. I also wanted a more complicated version of the pavilion from "Triforce", so I put this design together. Works in materials from beryl to CZ (RI = 1.58 - 2.16) with no changes, but I prefer it in triphane (light yellow spodumene). Suggested size = 8-20 mm

Wireframe

Triphane Triangle 3D view
Top viewSide viewFront viewBack view

Pavilion

#AngleFacetsNotes
G190.00°
131945517783
Set stone size.
G290.00°
151747497981
Level girdle.
P366.14°
131945517783
Level girdle.
P464.99°
151747497981
Meet P1, P2, P3
P249.05°
102242547486
Cut to 50% of P1.
P147.04°
141846507882
Cut to centerpoint.
P544.53°
164880
Meet P1, P4

Crown

#AngleFacetsNotes
C133.22°
151747497981
Set girdle width.
C233.22°
131945517783
Level girdle.
C332.16°
164880
Meet G2, C1
C431.82°
141846507882
Meet G1, G2, C1, C2
C520.37°
131945517783
Meet C2, C4; C1, C3, C4
C620.01°
164880
Meet C1, C3, C4, C5
T0.00°
24
Meet C5, C6