Heart of Darkness

by Arya Akhavan (October 2012)
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Gemology Projectopen
L/W
100%
Design RI
1.76
H/W
57%
Gear
96
V/W³
0.203
Symmetry
4 (mirrored)
Facets
161
Tiers
22
Crown
57
Pavilion
104

This pattern was designed for Jordan Wilkins, who asked for a square cushion "with good light return and a lot of sparkle", in dark Nigerian sapphire. He just so happened to ask me to design this when I needed a break from studying. Can be cut in materials from peridot to CZ (RI = 1.65 - 2.16) with no changes. Suggested size = 6-12 mm

Wireframe

Heart of Darkness 3D view
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Pavilion

#AngleFacetsNotes
G190.00°
 123254749717395
Set stone size.
G290.00°
 321274551697593
Level girdle.
G390.00°
 519294353677791
Level girdle.
P143.24°
 123254749717395
Cut to centerpoint.
P242.75°
 321274551697593
Meet at culet.
P641.95°
96244872
Meet P1, G1
P541.75°
 222264650707494
Meet P1, P2, G1, G2; P2, P3, P4
P341.75°
 519294353677791
Meet at culet.
P741.69°
96244872
Meet P1, P5, P6
P841.30°
 123254749717395
Meet P1, P5, P6, P7
P439.69°
 618304254667890
Meet P3, G3
P938.50°
 519294353677791
Meet P2, P3, P4, P5
P1137.50°
 222264650707494
Meet P5, P8, P9, P10; culet
P1037.12°
 321274551697593
Meet P5, P8, P9

Crown

#AngleFacetsNotes
C324.83°
 519294353677791
Level girdle.
C224.07°
 321274551697593
Level girdle.
C123.71°
 123254749717395
Set girdle width.
C422.89°
 222264650707494
Meet G1, G2, C1, C2
C518.79°
 123254749717395
Meet C1, C4
C612.12°
1014343858628286
Meet C2, C3, C4
C79.67°
 816324056648088
Meet C4, C5, C6
T0.00°
24
Meet C5, C7