Trottola

Marco Voltolini
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Gemology Projectopen
L/W
100%
Design RI
1.54
H/W
75%
Gear
96
V/W³
0.312
Symmetry
4
Facets
45
Tiers
9
Crown
17
Pavilion
28

If you have been not too precise E tier will require a little angle adjustment. An easy to cut square barion design a little different from the usual ones. Works on quartz, but shoud work well also with higher RI's.

Wireframe

Trottola 3D view
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Pavilion

#AngleFacetsNotes
290.00°
96244872
Set stone size
390.00°
12366084
460.00°
96244872
141.50°
96 61218243036424854606672788490
Cut to centerpoint

Crown

#AngleFacetsNotes
E40.72°
12366084
Meet A, B, C, girdle
A36.19°
96244872
Set girdle thickness
B30.00°
23477195
Meet girdle
C22.13°
21456993
Meet A, B
T0.00°
24
Meet B, C