Faceting 101 - Lesson 8

Ostentatious Oval
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Gemology Projectopen
L/W
120%
Design RI
1.61
H/W
78%
Gear
96
V/W³
0.329
Symmetry
2 (mirrored)
Facets
95
Tiers
20
Crown
39
Pavilion
56

by Arya Akhavan (November 2012)

Lesson 8 teaches the last concept of this unit, cutting a staggered barion (G1 - P4). As opposed to a geometric barion, a staggered barion chain-cuts the girdle and barion facets, and is usually used in ovals or cushions. This lesson also teaches cutting codependent facets/meets (C9), a facet that hits two meets at once. Lesson rules: cut in blue topaz, with no size restrictions

Wireframe

Faceting 101 - Lesson 8 3D view
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Pavilion

#AngleFacetsNotes
G190.00°
21276975
Set stone width.
G290.00°
12366084
Meet P1, G1 (continue false girdle)
G390.00°
 6425490
Meet P1, G2 (continue false girdle)
G490.00°
 2465094
Meet P1, G3 (continue false girdle)
P467.42°
 2465094
Level girdle.
P366.71°
 6425490
Level girdle.
P265.02°
12366084
Level girdle.
P142.02°
 3 91521273339455157636975818793
Cut to centerpoint.
P541.02°
 61218303642546066788490
Meet P1, P3, P4 (only 4 facets meet)

Crown

#AngleFacetsNotes
C452.05°
21276975
Level girdle.
C347.09°
12366084
Level girdle.
C642.18°
15336381
Meet G1, G2, C3, C4
C142.08°
 2465094
Set girdle width.
C242.08°
 6425490
Level girdle.
C542.08°
2472
Meet G1, C4
C736.99°
 4445292
Meet G3, G4, C1, C2; C2, C3, C6
C833.46°
 3455193
Meet C1, C7
C925.00°
21276975
Meet C2, C3, C6; C4, C5, C6
C1024.55°
 7415589
Meet C2, C3, C6, C7, C9
T0.00°
24
Meet C8, C10