Tessellation 21

Suite: Tessellation Party!
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Gemology Projectopen
L/W
115%
Design RI
1.62
H/W
74%
Gear
96
V/W³
0.288
Symmetry
2 (mirrored)
Facets
68
Tiers
20
Crown
32
Pavilion
26

by Arya Akhavan (January 2013)

Ugh, I can't believe I ever published the old version of this design. It was absolutely terrible, with no significant redeeming features. This new version features a cross-keel in the pavilion, and a counter-keel in the crown, something that nobody else seems to do. Particularly well-suited to tourmaline with bad off-axis colors (orient those on the X axis), but works in materials from topaz to rutile (RI = 1.61 - 2.62) with no changes.

Wireframe

Tessellation 21 3D view
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Pavilion

#AngleFacetsNotes
G290.00°
16326480
Level girdle.
G190.00°
2472
Set stone length.
G390.00°
 8405688
Meet P2, P3, G2
G490.00°
 3455193
Level girdle.
P665.18°
 3455193
Meet P1, P2, P5
P565.00°
 8405688
Level girdle.
P343.00°
16326480
Meet at culet.
P242.86°
15336381
Meet at culet.
P442.18°
2472
Meet at culet.
P742.00°
17316579
Meet P3, P4, G1, G2
P141.98°
14346282
Cut to centerpoint.

Crown

#AngleFacetsNotes
C144.12°
 3455193
Set girdle width.
C333.69°
16326480
Level girdle.
C530.48°
 5435391
Meet G3, G4, C1, C2
C230.00°
 8405688
Level girdle.
C430.00°
2472
Level girdle.
C624.14°
9648
Meet C1, C5
C718.00°
2472
Meet C2, C3, C4
C818.00°
 8405688
Meet C2, C3, C4, C5; C2, C5, C6
C915.72°
9648
Meet C2, C5, C6, C8; C7, C8