Epoch

by Arya Akhavan (August 2012)
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Gemology Projectopen
L/W
150%
Design RI
1.54
H/W
69%
Gear
96
V/W³
0.250
Symmetry
2 (mirrored)
Facets
49
Tiers
10
Crown
21
Pavilion
28

Designed for dark amethyst, but can be cut in RI = 1.52 - 2.16 with no changes. Be VERY careful with the P1 facets - they're very easy to overcut! To get a more "standard" reflection pattern (less like a warp drive), omit P2, and for P1, only cut on the (03-06-43-45-51-54-90-93). Suggested size = 8-15 mm.

Wireframe

Epoch 3D view
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Pavilion

#AngleFacetsNotes
G190.00°
 9395787
Cut even pseudogirdle (meet P1; P2)
P367.12°
 9395787
Cut level girdle (meet P1, G1; G1, P2)
P142.67°
 1 3 6 9394245474951545787909395
Cut to centrepoint.
P241.00°
12366084
Meet at centrepoint.

Crown

#AngleFacetsNotes
C154.76°
 9395787
Set girdle width.
C330.50°
 5435391
Meet G1, C1
C427.13°
 3455193
Meet G1, C1, C3
C223.96°
18306678
Meet G1, C1
C522.87°
17316579
Meet C1, C2, C3
T0.00°
24
Meet C2, C5; C3, C4, C5