Hexactly
| GemCad Ray Traces for RI = 1.72 | ||
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| Random Model | Cosine Model | ISO Model |
| Hexactly Designed by Bob Keller 12-00 bob@rockhounds.com | |
| An easy to cut meetpoint design for spinel, corundum, garnet. | |
| Angles for R.I. = 1.72 | 73 facets + 6 facets on girdle = 79 |
| 6-fold, mirror-image symmetry | 96 index |
| L/W = 1.155 T/W = 0.654 T/L = 0.567 P/W = 0.502 C/W = 0.209 | H/W = (P+C)/W+0.02 = 0.731 P/H = 0.687 C/H = 0.286 |
| Vol./W^3 = 0.311 | Brightness at 0 degrees tilt for RI = 1.72 COS = 81.4 ISO = 90.3 |
| Pavilion | |||
|---|---|---|---|
| g1 | 90.00 | 96-16-32-48-64-80 | Cut to equal depth – establish size |
| 2 | 65.00 | 96-16-32-48-64-80 | match g1 – make level girdle |
| 3 | 41.00 | 08-24-40-56-72-88 | meet g1,2 – culet |
| 4 | 43.13 | 06-10-22-26-38-42-54-58-70-74-86-90 | meet g1,2,3 |
| 5 | 39.61 | 05-11-21-27-37-43-53-59-69-75-85-91 | meet 2,4 – culet |
| Crown | |||
| a | 55.00 | 96-16-32-48-64-80 | match g1 – make level girdle |
| b | 45.00 | 02-14-18-30-34-46-50-62-66-78-82-94 | meet g1,a |
| c | 36.48 | 07-09-23-25-39-41-55-57-71-73-87-89 | meet g1,a,b |
| d | 34.00 | 08-24-40-56-72-88 | meet b,c |
| t | 0.00 | Table | meet b,c,d |