Parachute I
GemCad Ray Traces for RI = 1.54
Random Model Cosine Model ISO Model
GemCad Ray Traces for RI = 2.15
Random Model Cosine Model ISO Model
Parachute I
Designed by Bob Keller 11.26.01 Bob Keller
For Large Stones
Angles for R.I. = 1.54 and up 169 facets
24-fold symmetry 96 index
L/W = 1.000 T/W = 0.259 T/L = 0.259 H/W = 0.722
Vol./W^3 = 0.276 Brightness at 0° tilt for RI = 1.54 COS = 73.5 ISO = 76.6
Brightness at 0° tilt for RI = 2.15 COS = 78.6 ISO = 88.4
Pavilion
1 75.37 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 equal depth, establish girdle
2 41.00 02-06-10-14-18-22-26-30-34-38-42-46
50-54-58-62-66-70-74-78-82-86-90-94
Match 1, meet at culet
Crown
a 75.37 02-06-10-14-18-22-26-30-34-38-42-46
50-54-58-62-66-70-74-78-82-86-90-94
Match 1
b 50.59 02-06-10-14-18-22-26-30-34-38-42-46
50-54-58-62-66-70-74-78-82-86-90-94
Match a
c 33.31 02-06-10-14-18-22-26-30-34-38-42-46
50-54-58-62-66-70-74-78-82-86-90-94
Match b
d 21.15 02-06-10-14-18-22-26-30-34-38-42-46
50-54-58-62-66-70-74-78-82-86-90-94
Match c
e 11.80 02-06-10-14-18-22-26-30-34-38-42-46
50-54-58-62-66-70-74-78-82-86-90-94
Match d
t 0.00 Table


Index of Gem Designs

Perfect Transfer Index

Table of Contents


© Bob's Rock Shop Bob Keller