Lebourgeois Portuguese Cushion

by Arya Akhavan, derived from John Bailey
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Gemology Projectopen
L/W
124%
Design RI
1.61
H/W
96%
Gear
96
V/W³
0.511
Symmetry
2 (mirrored)
Facets
157
Tiers
28
Crown
41
Pavilion
116

December 2014

This design uses the outline and crown of John Bailey's "OMNI Cushion One", but uses a Portuguese pavilion with barion principles, and can still be cut in a meetpoint manner. It has a very similar appearance to the standard Portuguese's "light swirl" effect. Works in materials from topaz to corundum (RI = 1.61 - 1.76) with no changes, but can be adapted as low as quartz or as high as CZ with a bit of scaling.

Wireframe

Lebourgeois Portuguese Cushion 3D view
Top viewSide viewFront viewBack view

Pavilion

#AngleFacetsNotes
G190.00°
22267074
Set stone length.
G290.00°
20286876
Level girdle.
G390.00°
 5435391
Level girdle.
G490.00°
 3455193
Level girdle.
G590.00°
 1474995
Level girdle.
P1175.07°
 1474995
Meet P3, P4, P5, P10
P1073.44°
 3455193
Meet P4, P6, P9
P970.79°
 5435391
Meet P4, P6
P864.69°
22267074
Meet P4, P6
P762.77°
20286876
Meet P4, P6
P652.60°
 91521273339576369758187
Meet P3, P4
P448.51°
 612182430364254606672788490
Meet P2, P3
P548.16°
9648
Meet P2, P3
P345.48°
 3 91521273339455157636975818793
Meet P1, P2
P242.48°
96 61218243036424854606672788490
Cut conservatively.
P140.00°
 3 91521273339455157636975818793
Cut to centerpoint.

Crown

#AngleFacetsNotes
C145.53°
22267074
Set girdle width.
C545.00°
 1474995
Level girdle.
C444.89°
 3455193
Level girdle.
C244.68°
20286876
Level girdle.
C344.25°
 5435391
Level girdle.
C642.72°
9648
Meet G5, C5
C842.56°
21276975
Meet G1, G2, C1, C2; C2, C3, C7
C742.25°
 4445292
Meet G3, G4, C3, C4; C4, C5, C6
C1138.32°
 2465094
Meet C4, C5, C6, C7
C937.63°
2472
Meet C1, C8
C1028.85°
12366084
Meet C2, C3, C7, C8
T0.00°
24
Meet all table meets.