| GemCad Ray Traces for RI = 1.63 | ||
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||
| Random Model | Cosine Model | ISO Model |
| Liana I
designed by Bob Keller |
|
| Designed for a high school graduation present for my niece Liana. | |
| Angles for R.I. = 1.63 and up | 61 facets + 10 facets on girdle = 71 |
| 2-fold, mirror-image symmetry | 96 index |
| L/W = 1.911 T/W = 1.475 T/L = 0.772 P/W = 0.860 C/W = 0.154 | H/W = (P+C)/W+0.02 = 1.034 P/H = 0.831 C/H = 0.149 |
| Vol./W^3 = 0.833 | Brightness at 0 degrees tilt for RI = 1.63
COS = 71.7 ISO = 80.3 |
| Pavilion | |||
|---|---|---|---|
| a | 43.00 | 03-09-15-21-27-33-39-45-51-57-63-69-75-81-87-93 | Cut to temp centerpoint |
| g1 | 90.00 | 03-45-51-93 | Establishes size |
| g2 | 90.00 | 21-27-69-75 | |
| g3 | 90.00 | 24-72 | |
| b1 | 75.00 | 21-27-69-75 | Meet a.g1.g2 |
| b2 | 75.83 | 24-72 | Meet b1.g2.g3 |
| c | 42.09 | 96-48 | Meet a.g1 |
| d | 41.67 | 12-36-60-84 | Meet a.b1, c at culet |
| e | 41.19 | 24-72 | Meet a.b2, c.d at culet |
| Crown | |||
| 1 | 45.00 | 03-45-51-93 | Match g1 |
| 2 | 45.00 | 21-27-69-75 | Match g2 |
| 3 | 45.00 | 24-72 | Match g3 |
| 4 | 35.00 | 03-45-51-93 | Match 1 |
| 5 | 35.00 | 21-27-69-75 | Match 2 |
| 6 | 35.00 | 24-72 | Match 3 |
| 7 | 25.00 | 03-45-51-93 | Match 4 |
| 8 | 25.00 | 21-27-69-75 | Match 5 |
| 9 | 25.00 | 24-72 | Match 6 |
| t | 0.00 | Table | |
