Tiles
| GemCad Ray Traces for RI = 1.70 |
 |
| Random Model |
Cosine Model 71.3 |
ISO Model 83.5 |
Tiles
Designed by Fred Van Sant November 2001
Rendered by Bob Keller |
|
| Angles for R.I. = 1.70+ | 73 facets + 12 facets on girdle = 85 |
| 4-fold, mirror-image symmetry | 120 index |
| L/W = 1.000 T/W = 0.2078 C/W = .1508 | P/W = .5046 H/W = 0.6754 |
| a/W = .311701 b/W = .273118 | Brightness at 0 degrees tilt for RI = 1.70
COS = 71.3 ISO = 79.0 |
| Pavilion |
| a | 90.00 | 120-030-060-090 | From preform |
| b | 90.00 | 006-024-036-054-066-084-096-114 | From preform |
| 1 | 58.03 | 120-030-060-090 | Match a, establish lower girdle line |
| 2 | 53.75 | 006-024-036-054-066-084-096-114 | Meet 1.a.b |
| 3 | 41.00 | 015-045-075-105 | Meet 2.b.b.2 |
| 4 | 41.00 | 120-030-060-090 | Meet culet |
| 5 | 46.01 | 008-022-038-052-068-082-098-112 | Meet 3.2.b |
| 6 | 43.42 | 120-030-060-090 | Meet 1.2.5, 3.4.5 |
| Crown |
| 1 | 39.14 | 120-030-060-090 | Match a, establish upper girdle line |
| 2 | 43.22 | 006-024-036-054-066-084-096-114 | Meet 1.a.b |
| 3 | 37.54 | 002-028-032-058-062-088-092-118 | Meet 1.a.b.2 |
| 4 | 22.32 | 015-045-075-105 | Meet 2.b.b.2 |
| 5 | 16.73 | 005-025-035-055-065-085-095-115 | Meet 3.2.4 |
| 6 | 16.20 | 120-030-060-090 | Meet 1.3.5 |
| 7 | 12.00 | 120-030-060-090 | Match 6 (step cut) |
| 8 | 0.00 | Any | Table |
On pavilion, advise cutting sets 1 and 2 at higher angle when making girdle line, and recut last to fit 5 and 6.
| GemCad Ray Traces for RI = 1.70 |
 |
| Random Model |
Cosine Model 79.0 |
ISO Model 83.5 |
| Alternate Pavilion |
| a | 90.00 | 120-030-060-090 | From preform |
| b | 90.00 | 006-024-036-054-066-084-096-114 | From preform |
| 1 | 58.03 | 120-030-060-090 | Match a, establish lower girdle line |
| 2 | 53.75 | 006-024-036-054-066-084-096-114 | Meet 1.a.b |
| 3 | 41.00 | 015-045-075-105 | Meet 2.b.b.2 |
| 4 | 42.11 | 120-030-060-090 | Meet culet |
| 5 | 46.01 | 008-022-038-052-068-082-098-112 | Meet 3.2.b, 4.1.2 |
Alternate Pavilion: Same as above except set 6 is eliminated. Set 4 is extended to meet point where facets 1-2-5 meet. Set 4 angle is 42.11°.
| Tiles Preform |
| pf1 | 39.28 | 120-030-060-090 | Meet TCP |
| pf2 | 37.98 | 006-024-036-054-066-084-096-114 | Meet TCP |
| a | 90.00 | 120-030-060-090 | Match pf1, establish size |
| b | 90.00 | 006-024-036-054-066-084-096-114 | Meet pf1.a.b |
