Faceting 101 - Lesson 3

Standard Round Brilliant (unstacked)
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L/W
100%
Design RI
1.54
H/W
59%
Gear
96
V/W³
0.188
Symmetry
8 (mirrored)
Facets
73
Tiers
7
Crown
33
Pavilion
40

by Marcel Tolkowsky (modification in public domain)

Our third lesson is a slight modification on the "Standard Round Brilliant", or SRB. This lesson teaches how to cut meetpoints on the pavilion (P2), how to cut the stone to specifications (G1, C1), how to make new meetpoints by cutting to old ones (C2), and how to cut the table to a meetpoint (T). Lesson rules: cut in clear quartz, with W = 10 mm (+/- 2.0 mm) and G = 0.3 mm (+/- 0.2 mm)

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Faceting 101 - Lesson 3 3D view
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Pavilion

#AngleFacetsNotes
G190.00°
 3 91521273339455157636975818793
Set stone size.
P143.50°
 3 91521273339455157636975818793
Cut to centerpoint.
P241.50°
 618304254667890
Meet P1, G1

Crown

#AngleFacetsNotes
C131.00°
 3 91521273339455157636975818793
Set girdle width.
C227.00°
9612243648607284
Meet G1, C1
C316.00°
 618304254667890
Meet C1, C2
T0.00°
24
Meet C2, C3