Pentacle
| Pentacle – Designed by Paul A. Head headbnk@azstarnet.com ©1995 | |
|---|---|
| Angles for R.I. = 1.54 | 41 facets + 5 facets on girdle = 46 |
| 1-fold, mirror image symmetry | 96 index |
| Note: The girdle facets are not equal. | |
| L/W = 1.042 T/W = 0.460 T/L = 0.442 P/W = 43.0% C/W = 14.6% | H/W = (P+C)/W+0.02 = 0.600 P/H = 0.+670 C/H = 0.300 |
| Vol./W^3 = 0.192 | Brightness at 0 degrees tilt for quartz ISO = 93.0% |
| Pavilion | |||
|---|---|---|---|
| P1 | 42.6 | 01-18-20-37-59-76-78-95 | Cut to temporary center point. |
| G1 | 90.0 | 96-19-38-58-77 | Establish stone width. |
| P2 | 46.0 | 96-19-38-58-77 | Meet P1, P1, G1 for level girdle. |
| P3 | 42.0 | 96-19-38-58-77 | Meet P1, P1, P2 at break point. |
| P4 | 42.4 | 39-57 | Meet G1, G1, P2. |
| Crown | |||
| C1 | 34.0 | 96-19-77 | Cut level girdle. |
| C2 | 33.7 | 38-58 | Complete girdle. |
| C3 | 29.5 | 01-18-20-76-78-95 | Meet G1, G1, C1 at girdle. |
| C4 | 29.4 | 37-59 | Meet G1, G1, C2 at girdle. |
| C5 | 29.3 | 39-57 | Meet G1, G1, C2 at girdle. |
| C6 | 27.8 | 96-19-77 | Meet C1, C3, C3 at break point. |
| C7 | 27.5 | 38-58 | Meet C2, C4, C5 at break point. |
| TABLE | 0.00 | ANY | Meet C3, C3, C6. |
| R.I. = 1.62 : C.A. = 38.1 TOPAZ ISO Brigtness = 93.2% |
R.I. = 1.76 : C.A. = 34.6 CORUNDUM ISO Brigtness = 94.1% |
R.I. = 2.15 : C.A. = 27.7 CUBIC ZIRCONIUM ISO Brigtness = 93.2% |
|||||||||
| P1 | 42.6 | C1 | 39.0 | P1 | 41.6 | C1 | 36.0 | P1 | 41.1 | C1 | 34.0 |
| G1 | 90.0 | C2 | 38.6 | G1 | 90.0 | C2 | 35.6 | G1 | 90.0 | C2 | 33.7 |
| P2 | 46.0 | C3 | 34.2 | P2 | 45.0 | C3 | 31.4 | P2 | 44.5 | C3 | 29.5 |
| P3 | 42.0 | C4 | 34.0 | P3 | 41.0 | C4 | 31.2 | P3 | 40.5 | C4 | 29.4 |
| P4 | 42.4 | C5 | 33.9 | P4 | 41.4 | C5 | 31.1 | P4 | 40.9 | C5 | 29.3 |
| %Z | 43.0 | C6 | 32.4 | %Z | 41.5 | C6 | 29.6 | %Z | 40.8 | C6 | 27.8 |
| C7 | 32.0 | C7 | 29.3 | C7 | 27.5 | ||||||
| %Z | 17.5 | %Z | 15.7 | %Z | 14.6 | ||||||
GemCad File