Tessellation 37 (I)

Suite: Tessellation Party!
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Gemology Projectopen
L/W
120%
Design RI
1.62
H/W
81%
Gear
96
V/W³
0.419
Symmetry
2 (mirrored)
Facets
84
Tiers
26
Crown
40
Pavilion
32

by Arya Akhavan (October 2014)

For some reason, the I-type designs in this suite are very hard to get to work, and since the crown is technically a keel instead of an apex or table, the pavilion usually requires a counter-keel. Notice how the pavilion facets are all very close in angle and index? That means they'll all cut very, VERY fast. Prepolish them in. Works in materials from topaz to rutile (RI = 1.61 - 2.62) with no changes, but should work in closed-C tourmalines.

Wireframe

Tessellation 37 (I) 3D view
Top viewSide viewFront viewBack view

Pavilion

#AngleFacetsNotes
G190.00°
2472
Set stone length.
G290.00°
13356183
Meet P1, P2, G1
G390.00°
10385886
Level girdle.
G490.00°
9648
Level girdle.
P875.00°
9648
Meet P5, P6
P770.92°
10385886
Meet P3, P4, P5, P6
P366.57°
13356183
Level girdle.
P942.08°
2472
Level girdle.
P641.46°
19296777
Meet P3, P4, P5
P241.00°
23257173
Meet at culet.
P440.91°
21276975
Meet P1, P2, G1, G2, P3
P540.68°
20286876
Meet P1, P4
P140.61°
22267074
Cut to centerpoint.

Crown

#AngleFacetsNotes
C462.77°
9648
Level girdle.
C352.02°
10385886
Level girdle.
C551.61°
 3455193
Meet G3, G4, C3, C4
C249.62°
13356183
Level girdle.
C144.57°
2472
Set girdle width.
C631.83°
18306678
Meet G1, G2, C1, C2
C727.48°
13356183
Meet C2, C3, C5
C826.22°
 8405688
Meet C3, C5, C7; C4, C5
C1023.58°
2472
Meet C1, C6
C1117.45°
2472
Meet C6, C7, C10
C915.87°
9648
Meet C4, C5, C8
C1215.36°
18306678
Meet C6, C7, C10, C11; C7, C8, C9
C136.00°
9648
Meet C7, C8, C9; C11, C12