Nonohno by Jack Rowland

Nonohno
Design Copyright 3/95 by Jack Rowland
Angles for R.I. = 1.54 40 facets + 9 facets on girdle = 49
3-fold, mirror-image symmetry 96 index
L/W = 1.030 T/W = 0.552 T/L = 0.536 P/W = 0.467 C/W = 0.178
H/W = (P+C)/W+0.02 = 0.665 P/H = 0.703 C/H = 0.267
Vol./W^3 = 0.234

Pavilion
c 42.00 05-16-27-37-48-59-69-80-91 Cut to center point
b1 55.00 11-21-43-53-75-85 Cut to pinch off c
g1 90.00 11-21-43-53-75-85 Place girdle for next meet
b2 55.00 96-32-64 Meet at b1-c-g1
g2 90.00 96-32-64 Level girdle

Crown
B1 40.00 96-32-64 Leave some girdle
B2 40.00 11-21-43-53-75-85 Level girdle
M1 34.00 03-29-35-61-67-93 Cut girdle to meet
S 25.00 96-32-64 Cut to M1-B1 meet
T 00.00 Table Cut to S-B2 meet
M2 34.64 16-48-80 Cheat angle to meet at table & girdle

Download PDF format printer friendly cutting instructions: [ Download Icon Nonohno Printer Icon ]

Download the GemCad format design file: [ Download Icon nonohno.gem ]

This month's cut is another unusual stone in that it is a fairly symmetric 9 sided stone cut on a 96 index. It is an 9 sided round brilliant. I called it NONOHNO because a nonogon is a nine sided figure in geometry and when I saw the table on the diagram all I could say was OH NO. It just doesn't look quite right. The stone looks fine, its the diagram that looks weird. This one takes advantage of 96 and 9 both being divisible by 3. I use a mirror image symmetry of 3 and get 6 equal cuts with 3 nearly equal cuts in between. To the naked eye it is a symmetrical 9 sided stone.

It is simple to cut and should be classified as simple to cut. Happy cutting!


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