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Taylor-Burton Diamond Replica Computed by Fred Van Sant

GemCad Ray Traces for RI = 1.70   Zero Tilt
Random Model Cosine Model ISO Model
GemCad Ray Traces for RI = 2.15   Zero Tilt
Random Model Cosine Model ISO Model
Taylor-Burton Diamond Replica
Computed by Fred Van Sant for Hugh Rackets May 5,1999.
GemCad rendering and meetpoint particulars by Bob Keller
Angles for R.I. = 1.7+ 85 facets + 24 facets on girdle = 109
1-fold, mirror-image symmetry 96 index
Taylor-Burton Diamond: 69.4 carats   21.7 mm wide
L/W = 1.505   TA = 27.2%   T/W = 0.50   C/W=.188   P/W = 0.450   H/W = 0.659
G1/W = 0.131   G2,3,4,5,6/W = 0.194   G7/W = .205   VF = 0.319   GVF = 0.011
Brightness at 0 degrees tilt for RI = 1.70
COS = 45.7   ISO = 63.5
Brightness at 0 tilt for RI = 2.15
COS = 43.3   ISO = 67.2
History of the Taylor-Burton Diamond
Pavilion
1 44.01 02-06-10-14-18-22-74-78-82-86-90-94 Cut to permanent center point
2 43.51 25-71 Meet g1.1.g2
3 42.51 27-69 Meet g2.2.g3
4 40.72 29-67 Meet g3.3.g4
5 37.74 32-64 Meet g4.4.g5
6 33.95 35-61 Meet g5.5.g6
7 32.00 38-58 Meet g6.6.g7
8 42.00 96-08-16-24-72-80-88 Meet 80,88,96,08,16 @ g1.1.1.g1 - 24,72 @ g1.1.2.g2
9 40.17 28-68 Meet g3.3.4.g4
10 33.61 34-62 Meet g5.5.6.g6
11 24.14 48 Meet g7.7.7.g7
Crown
1 39.70 02-06-10-14-18-22-74-78-82-86-90-94 Match g1   establish level girdle
2 39.16 25-71 Meet g1.1.g2
3 38.57 27-69 Meet g2.2.g3
4 37.55 29-67 Meet g3.3.g4
5 35.89 32-64 Meet g4.4.g5
6 36.68 35-61 Meet g5.5.g6
7 36.36 38-58 Meet g6.6.g7
8 37.00 96-08-16-24-72-80-88 Meet 80,88,96,08,16 @ g1.1.1.g1 - 24,72 @ g1.1.2.g2
9 35.94 28-68 Meet g3.3.4.g4
10 33.45 33-63 Meet g5.5.6.g6
11 25.59 48 Meet g7.7.7.g7
12 32.04 04-12-20-76-84-92 Meet 8.1.1.8
13 32.67 26-70 Meet 8.2.3.9
14 30.55 30-66 Meet 9.4.5.10
15 26.33 35-61 Meet 10.6.7.11
T 0.00 Table Meet 12.8.12   12.8.13   13.9.14   14.10.15   15.11.15

Taylor-Burton CAM Preform
1 39.56 02-06-10-14-18-22-74-78-82-86-90-94 Cut to temporary center point
2 39.38 25-71 Cut to temporary center point
3 38.45 27-69 Cut to temporary center point
4 36.73 29-67 Cut to temporary center point
5 33.50 32-64 Cut to temporary center point
6 30.24 35-61 Cut to temporary center point
7 27.19 38-58 Cut to temporary center point
g1 90.00 02-06-10-14-18-22-74-78-82-86-90-94 Match 1
g2 90.00 25-71 Match 2
g3 90.00 27-69 Match 3
g4 90.00 29-67 Match 4
g5 90.00 32-64 Match 5
g6 90.00 35-61 Match 6
g7 90.00 38-58 Match 7

Taylor-Burton CAM Preform and Taylor-Burton Replica GemCad Design Files are available for GemCad users.

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