Quebec Cushion

by Arya Akhavan (December 2015)

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L/W: 131%
Design RI: 1.54
H/W: 92%
Gear: 96
V/W³: 0.546
Symmetry: 2 (mirrored)
Facets: 97
Tiers: 24
Crown: 41
Pavilion: 56

This design was written for William Parent over a Skype chat, as a high-yield design for a preformed 150ct+ piece of untreated morganite he had. The design matches the rough's general outline, L/W ratio, and height. Although the pavilion is an easy barion, the crown can be a bit tricky for some of the compound meetpoints. Looks great in the beryls, and works in materials from quartz to rutile (RI = 1.54 - 2.62) with no changes.

Wireframe

Pavilion

#	Angle	Facets	Notes
G1	90.00°	9648	Set stone width.
G2	90.00°	4445292	Meet P1, G1
G3	90.00°	20286876	Meet P1, G2
G4	90.00°	22267074	Meet P1, G3
G5	90.00°	2472	Meet P1, G4
P6	77.89°	9648	Level girdle.
P5	75.97°	4445292	Level girdle.
P4	67.22°	2472	Level girdle.
P3	67.04°	22267074	Level girdle.
P2	66.50°	20286876	Level girdle.
P1	43.50°	96 4 8121620242832364044485256606468727680848892	Cut to centerpoint.

Crown

#	Angle	Facets	Notes
C1	45.00°	9648	Set girdle width.
C2	39.84°	4445292	Level girdle.
C3	39.84°	20286876	Level girdle.
C4	39.84°	22267074	Level girdle.
C5	39.84°	2472	Level girdle.
C6	39.84°	1474995	Meet G1, G2, C1, C2
C8	38.34°	23257173	Meet G4, G5, C4, C5; C3, C4, C7
C9	36.90°	2472	Meet C5, C8
C7	31.89°	12366084	Meet G2, G3, C2, C3
C10	29.06°	9648	Meet C1, C6; C2, C6, C7
C11	26.49°	18306678	Meet C3, C4, C7, C8
C12	22.31°	1474995	Meet C2, C6, C7, C10
T	0.00°	24	Meet C8, C9, C11; C7, C11, C12; C10, C12