Tessellation 29 (R)

Suite: Tessellation Party!
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Gemology Projectopen
L/W
104%
Design RI
1.54
H/W
72%
Gear
80
V/W³
0.300
Symmetry
2 (mirrored)
Facets
43
Tiers
15
Crown
15
Pavilion
20

by Arya Akhavan (November 2013)

Here's another pentagonal tessellation-style design. Cool science - this is from a Penrose tiling, not a true tessellation. You can't tile a floor entirely out of pentagons, and a true crystal can't have 5-fold symmetry! Works in materials from quartz to CZ (RI = 1.54 - 2.16) with no changes, but I prefer it in morganite. Suggested lengnth = 6-10 mm

Wireframe

Tessellation 29 (R) 3D view
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Pavilion

#AngleFacetsNotes
G190.00°
8040
Set stone width.
G290.00°
 9314971
Level girdle.
G390.00°
2060
Meet P3, P4, G2
P671.15°
2060
Level girdle.
P566.22°
8040
Level girdle.
P344.84°
 9314971
Meet P1, P2, G1
P444.44°
10305070
Meet P1, P3
P242.70°
 4364476
Meet at culet.
P142.50°
 6344674
Cut to centerpoint.

Crown

#AngleFacetsNotes
C169.86°
 9314971
Set girdle width.
C264.25°
8040
Level girdle.
C334.74°
2060
Level girdle.
C530.49°
8040
Meet C1, C2, C4
C420.00°
16245664
Meet G2, G3, C1, C3
T0.00°
20
Meet C4, C5