Faith

Suite: The Stone-Like
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Gemology Projectopen
L/W
100%
Design RI
1.54
H/W
72%
Gear
96
V/W³
0.253
Symmetry
4 (mirrored)
Facets
56
Tiers
9
Crown
24
Pavilion
28

by Arya Akhavan (June 2015)

I don't write a lot of apex crowns, but this simple apex design turned out very nicely. I have absolutely no idea how. It's fast and simple to cut, has an easy girdle outline to establish, and has a very interesting reflection pattern that changes dramatically as the RI increases. Works in materials from petalite to rutile (RI = 1.50 - 2.62) with no changes.

Wireframe

Faith 3D view
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Pavilion

#AngleFacetsNotes
G290.00°
12366084
Level girdle.
G190.00°
 222264650707494
Set stone size.
P244.00°
 222264650707494
Level girdle.
P343.22°
12366084
Meet P1, P2
P142.00°
 123254749717395
Cut to centerpoint.

Crown

#AngleFacetsNotes
C136.00°
 222264650707494
Set girdle width.
C332.03°
 420284452687692
Meet G1, G2, C1, C2
C231.31°
12366084
Level girdle.
C415.00°
96244872
Meet C1, C3; C2, C3