Novice Cushion Triangle
| Novice Cushion Triangle – designed by Robert Strickland 9-23-98 rstrick@compuserve.com | |
|---|---|
| Angles for R.I. = 1.54 | 43 facets |
| 3-fold, mirror image symmetry | 96 index |
| L/W = 1.009 T/W = 0.604 T/L = 0.598 P/W = 0.403 C/W = 0.122 | H/W = (P+C)/W+0.02 = 0.545 P/H = 0.739 C/H = 0.224 |
| Vol./W^3 = 0.161 | Brightness at 0 degrees tilt for quartz COS = 69.8 ISO = 89.4 |
| Pavilion | |||
|---|---|---|---|
| 1 | 45.00 | 02-30-34-62-66-94 | Meet at temporary center point |
| 2 | 44.00 | 96-32-64 | Size stone. Meet at final center point |
| 3 | 42.50 | 06-26-38-58-70-90 | Meet 1-1-2-2 |
| G1 | 90.00 | 02-30-34-62-66-94 | Meet 1 and 2 |
| G2 | 90.00 | 06-26-38-58-70-90 | Level girdle |
| Crown | |||
| A | 40.00 | 02-30-34-62-66-94 | Leave some girdle |
| B | 33.00 | 06-26-38-58-70-90 | Level girdle |
| C | 37.50 | 96-32-64 | Meet girdle |
| T | 0.00 | Table | Table |
| Suitable for a beginner’s third or forth stone. Good optical performance despite the small number of facets. | |||