Ayn Rand by Carl R. Downey

Ayn Rand - designed by Carl R. Downey alckytxn@flash.net ©1998
Created to fit a piece of medium Bolivian amethyst
Angles for R.I. = 1.54 48 facets + 10 facets on girdle = 58
1-fold symmetry 96 index
L/W = 1.155 T/W = 0.647 T/L = 0.561 P/W = 0.410 C/W = 0.158 H/W = (P+C)/W+0.02 = 0.588 P/H = 0.697 C/H = 0.269
Vol./W^3 = 0.187 Brightness at 0 degrees tilt for R.I. = 1.54
COS = 50.5 ISO = 68.2

Pavilion
1 90.00 96-04-08-12-16-84-88-92 if you cut 80 & 20 too you will have..
2 90.00 64 ..an 'edge' to cut down to for...
3 90.00 32 ...the sides
4 50.00 32 establish girdle
5 50.00 64 level girdle at point
6 43.50 96-04-08-12-16-84-88-92 finish leveling girdle
7 42.50 02-06-10-14-86-90-94 meet at girdle facets as shown
Crown
a 55.00 96-04-08-12-80-84-88-92 this is all fairly straight forward
b 55.00 32  
c 55.00 64  
d 40.00 96-04-08-12-80-84-88-92  
e 40.00 64  
f 40.00 32  
g 20.00 96-04-08-12-80-84-88-92  
h 20.00 64  
i 20.00 32  
T 0.00 Table meet g-g-i
This cut may lend itself to carving or 'dimples' on the large pavilion facets.


Index of Gem Designs

Perfect Transfer Index

Table of Contents


© Bob's Rock Shop Bob Keller