Montezuma's Crown

by Arya Akhavan (February 2013)
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Gemology Projectopen
L/W
100%
Design RI
1.58
H/W
65%
Gear
96
V/W³
0.180
Symmetry
1 (mirrored)
Facets
53
Tiers
12
Crown
25
Pavilion
28

Honestly, at this point I'm just being unoriginal. I saw a similarly-shaped stone on someone's Facebook page, and decided to write my own design in this style. In a more gold color, it looks very much like an Aztec or Mayan crown. Works in materials from quartz to YAG (RI = 1.54 - 1.83) with no changes, but I prefer heliodor. Suggested width = 10-15 mm

Wireframe

Montezuma's Crown 3D view
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Pavilion

#AngleFacetsNotes
G190.00°
 3 9152175818793
Set stone size.
G290.00°
3660
Meet P1, G1
P270.00°
3660
Level girdle.
P143.00°
 3 91521273339455157636975818793
Cut to centerpoint.

Crown

#AngleFacetsNotes
C140.00°
3660
Set girdle width.
C240.00°
 3 9152175818793
Level girdle.
C335.00°
 61218788490
Meet G1, C2
C435.00°
3561
Meet G1, G2, C1, C2
C534.67°
3759
Meet G1, C1
C624.04°
3165
Meet C2, C3, C4
C724.00°
 690
Meet C2, C3; C3, C6
T0.00°
24
Meet C3, C6, C7; C4, C5, C6