Faceting 121 - Lesson 1B

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Gemology Projectopen
L/W
100%
Design RI
1.69
H/W
64%
Gear
96
V/W³
0.220
Symmetry
8 (mirrored)
Facets
41
Tiers
6
Crown
9
Pavilion
32

by Arya Akhavan (November 2012)

We've taken the first pattern from this lesson, and added an extra set of pavilion facets. Let's see how this changes the extinction pattern, the light return, and the scintillation. Try rendering this in amethyst and comparing it to an amethyst rendering of the first design from the lesson. Lesson rules: cut in tanzanite, trying to match colors with lesson 1A and 1C

Wireframe

Faceting 121 - Lesson 1B 3D view
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Pavilion

#AngleFacetsNotes
G190.00°
9612243648607284
Set stone size.
P143.35°
9612243648607284
Cut to centerpoint.
P241.35°
 1111323253537474959617173838595
Meet P1, G1

Crown

#AngleFacetsNotes
C239.64°
12366084
Level girdle.
C130.36°
96244872
Set girdle width.
C30.00°
24
Meet C1, C2