Tessellation 28 (Q)

Suite: Tessellation Party!
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Gemology Projectopen
L/W
105%
Design RI
1.54
H/W
68%
Gear
80
V/W³
0.225
Symmetry
5 (mirrored)
Facets
56
Tiers
10
Crown
16
Pavilion
30

by Arya Akhavan (November 2012)

And now I'm back to fun with pentagons! Pentagons in these tessellation-style crowns are surprisingly hard to get to work properly. This was probably one of the easiest variants to write, with its cool little star in the pavilion. Works in materials from quartz to CZ (RI = 1.54 - 2.16) with no changes, but I prefer it in tanzanite. Suggested size = 6-12 mm

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Tessellation 28 (Q) 3D view
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Pavilion

#AngleFacetsNotes
G190.00°
 824405672
Set stone size.
G290.00°
8016324864
Meet P1, P2, G1
P366.11°
8016324864
Level girdle.
P143.47°
 824405672
Cut to centerpoint.
P243.00°
 3131929354551616777
Meet at culet.
P442.00°
 2141830344650626678
Meet P2, P3

Crown

#AngleFacetsNotes
C137.03°
8016324864
Set girdle width.
C225.00°
 824405672
Level girdle.
C316.08°
8016324864
Meet C1, C2
T0.00°
20
Meet C2, C3