Event Horizon

by Arya Akhavan (November 2013)

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L/W: 101%
Design RI: 1.62
H/W: 63%
Gear: 96
V/W³: 0.195
Symmetry: 3 (mirrored)
Facets: 82
Tiers: 17
Crown: 37
Pavilion: 36

This design is a bit of a departure from how I normally generate girdle outlines, but it pays off. The face-up appearance of the stone has interesting rays that are technically windows, but give it a cool "space" effect! Works in materials from beryl to CZ (RI = 1.58 - 2.16) with no changes, but I like it in minty tourmaline. Suggested size = 7-15 mm

Wireframe

Pavilion

#	Angle	Facets	Notes
G2	90.00°	131945517783	Level girdle.
G3	90.00°	164880	Level girdle.
G1	90.00°	102242547486	Set stone size.
P5	55.00°	131945517783	Meet P1, G1, P3
P6	55.00°	164880	Meet P3, P4, P5
P4	45.37°	164880	Meet P1, P2, P3
P3	44.04°	112143537585	Meet P1, P2
P1	43.19°	102242547486	Cut to centerpoint.
P2	41.50°	92341557387	Meet P1, G1

Crown

#	Angle	Facets	Notes
C1	45.00°	164880	Set girdle width.
C2	45.00°	131945517783	Level girdle.
C3	41.95°	102242547486	Level girdle.
C4	39.84°	122044527684	Meet G1, G2, C2, C3
C5	34.53°	131945517783	Meet C1, C2, C4; C3, C4
C7	33.98°	164880	Meet C1, C2, C4, C5, C6
C6	32.36°	141846507882	Meet C1, C2, C4, C5
T	0.00°	24	Meet C5, C6; C6, C7