Towner, James M; Lapidary Journal, Jul 1968, p544;
| # | Angle | Facets | Notes |
|---|---|---|---|
| G1 | 90.00° | 4 81620283240445256 | |
| P1 | 50.00° | 4 81620283240445256 | |
| P2 | 43.00° | 6012243648 | |
| P3 | 38.00° | 6012243648 |
| # | Angle | Facets | Notes |
|---|---|---|---|
| C1 | 57.00° | 4 81620283240445256 | |
| C2 | 47.02° | 3 91521273339455157 | |
| C3 | 43.09° | 2101422263438465058 | |
| C4 | 39.41° | 6012243648 | |
| T | 0.00° | 60 |