Lydia's Barion

Lydia's Barion
designed by Bob Keller Copyright 2000
Angles for R.I. = 1.54 157 facets + 24 facets on girdle = 181
4-fold, mirror-image symmetry 96 index
L/W = 1.000 T/W = 0.598 T/L = 0.598 P/W = 0.530 C/W = 0.150 H/W = (P+C)/W+0.02 = 0.700 P/H = 0.757 C/H = 0.214
Vol./W^3 = 0.291 Brightness at 0 degrees tilt for RI = 1.54
COS = 65.6 ISO = 69.4
Pavilion for Light to Medium Color Quartz
1 42.70 02-06-10-14-18-22-26-30-34-38-42-46-
50-54-58-62-66-70-74-78-82-86-90-94
Cut to center point
G2 90.00 05-19-29-43-53-67-77-91 Match 1, establish size
G3 90.00 03-21-27-45-51-69-75-93 Meet G1,1
G4 90.00 01-23-25-47-49-71-73-95 Meet G2,1
5 65.00 05-19-29-43-53-67-77-91 Meet 1,G2, make level girdle
6 65.76 03-21-27-45-51-69-75-93 Meet G1,G2,5
7 66.13 01-23-25-47-49-71-73-95 Meet G2,G3,6
8 42.00 04-20-28-44-52-68-76-92 Meet 1,6,7 - culet
9 42.14 12-36-60-84 Meet G2,5 - 1,8 - culet
Crown
A 50.00 05-19-29-43-53-67-77-91 Match G2 establish upper girdle line
B 50.00 03-21-27-45-51-69-75-93 Meet G2,G3,A
C 50.00 01-23-25-47-49-71-73-95 Meet G3,G4,B
D 40.00 05-19-29-43-53-67-77-91 Match A
E 40.00 03-21-27-45-51-69-75-93 Meet A,B,D
F 40.00 01-23-25-47-49-71-73-95 Meet B,C,E
G 30.00 05-19-29-43-53-67-77-91 Match D
H 30.00 03-21-27-45-51-69-75-93 Meet D,E,G
I 30.00 01-23-25-47-49-71-73-95 Meet E,F,H
J 20.00 05-19-29-43-53-67-77-91 Match G
K 20.00 03-21-27-45-51-69-75-93 Meet G,H,J
L 20.00 01-23-25-47-49-71-73-95 Meet H,I,K
T 0.00 Table  

GemCad Ray Traces for RI = 1.54
Random Model Cosine Model ISO Model

Angles for R.I. = 1.63 157 facets + 24 facets on girdle = 181
4-fold, mirror-image symmetry 96 index
L/W = 1.000 T/W = 0.598 T/L = 0.598 P/W = 0.511 C/W = 0.150 H/W = (P+C)/W+0.02 = 0.681 P/H = 0.751 C/H = 0.220
Vol./W^3 = 0.291 Brightness at 0 degrees tilt for RI = 1.63
COS = 78.0 ISO = 83.3
Pavilion for Light to Medium Color Topaz / Tourmaline
1 41.70 02-06-10-14-18-22-26-30-34-38-42-46-
50-54-58-62-66-70-74-78-82-86-90-94
Cut to center point
G2 90.00 05-19-29-43-53-67-77-91 Match 1, establish size
G3 90.00 03-21-27-45-51-69-75-93 Meet G1,1
G4 90.00 01-23-25-47-49-71-73-95 Meet G2,1
5 64.22 05-19-29-43-53-67-77-91 Meet 1,G2, make level girdle
6 65.00 03-21-27-45-51-69-75-93 Meet G1,G2,5
7 65.38 01-23-25-47-49-71-73-95 Meet G2,G3,6
8 41.00 04-20-28-44-52-68-76-92 Meet 1,6,7 - culet
9 41.13 12-36-60-84 Meet G2,5 - 1,8 - culet

GemCad Ray Traces for RI = 1.63
Random Model Cosine Model ISO Model


Index of Gem Designs

Perfect Transfer Index

Table of Contents


© Bob's Rock Shop Bob Keller