Tessellation 23 (P)

Suite: Tessellation Party!
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Gemology Projectopen
L/W
103%
Design RI
1.65
H/W
64%
Gear
80
V/W³
0.205
Symmetry
5 (mirrored)
Facets
66
Tiers
9
Crown
36
Pavilion
20

by Arya Akhavan (March 2013)

Well...I'm not really sure if this counts as something that belongs in the suite, since the triangles aren't regular, but it's the closest you can get to a regular arrangement with pentagons. Future versions might use a 120 index. Works in materials from beryl to rutile (RI = 1.58 - 2.62) with no changes, but I prefer rich kunzite. Suggested size = 6-10 mm.

Wireframe

Tessellation 23 (P) 3D view
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Pavilion

#AngleFacetsNotes
G190.00°
 3131929354551616777
Set stone size.
P243.50°
 3131929354551616777
Level girdle.
P142.00°
 1151731334749636579
Cut to centerpoint.

Crown

#AngleFacetsNotes
C142.62°
 3131929354551616777
Set girdle width.
C234.70°
 4122028364452606876
Meet G1, C1
C330.49°
 824405672
Meet G1, C1, C2
C420.00°
8016324864
Meet C1, C2
C520.00°
 824405672
Meet C2, C3, C4
T0.00°
20
Meet C4, C5