13021 Tre Foil
- L/W
- 101%
- Design RI
- 1.54
- H/W
- 69%
- Gear
- 72
- V/W³
- 0.241
- Symmetry
- 3 (mirrored)
- Facets
- 73
- Tiers
- 18
- Crown
- 37
- Pavilion
- 73
Naples, Donald G; Lapidary Journal, Sep 1979, p1278;
Wireframe
Pavilion
| # | Angle | Facets | Notes |
|---|---|---|---|
| G1 | 90.00° | 722448 | |
| G2 | 90.00° | 42028445268 | |
| G3 | 90.00° | 81632405664 | |
| P1 | 51.00° | 722448 | |
| P2 | 50.00° | 32127455169 | |
| P3 | 46.00° | 22226465070 | |
| P4 | 42.00° | 722448 | |
| P5 | 41.00° | 101434385862 | |
| P6 | 40.00° | 91533395763 | |
| P7 | 39.00° | 81632405664 |
Crown
| # | Angle | Facets | Notes |
|---|---|---|---|
| C1 | 45.11° | 42028445268 | |
| C2 | 44.00° | 81632405664 | |
| C3 | 42.43° | 722448 | |
| C4 | 42.00° | 71731415565 | |
| C5 | 39.65° | 22226465070 | |
| C6 | 35.05° | 722448 | |
| C7 | 35.00° | 42028445268 | |
| T | 0.00° | 36 |