| Rose Sphere 240-120 - designed by Bob Keller ©1999 | |
|---|---|
| 240 facets | 120 index |
| L/W = 1.000 H/W = 1.000 | Vol./W^3 = 0.494 |
| Hemisphere A | |||
|---|---|---|---|
| p | 90.00 | 003-009-015-021-027-033-039-045-051-057- 063-069-075-081-087-093-099-105-111-117 | Cut to equal depth, set size |
| 1 | 81.11 | 003-009-015-021-027-033-039-045-051-057- 063-069-075-081-087-093-099-105-111-117 | Cut level girdle (equator) line |
| 2 | 72.83 | 120-012-024-036-048-060-072-084-096-108 | Meet p,1 |
| 3 | 71.09 | 120-012-024-036-048-060-072-084-096-108 | Meet 1,2 |
| 4 | 63.29 | 003-009-015-021-027-033-039-045-051-057- 063-069-075-081-087-093-099-105-111-117 | Meet 1,2,3 |
| 5 | 45.35 | 003-009-015-021-027-033-039-045-051-057- 063-069-075-081-087-093-099-105-111-117 | Meet 3,4 |
| 6 | 41.51 | 120-012-024-036-048-060-072-084-096-108 | Meet 3,4,5 |
| 7 | 29.60 | 120-012-024-036-048-060-072-084-096-108 | Meet 5,6 |
| 8 | 25.79 | 006-018-030-042-054-066-078-090-102-114 | Meet 5,6,7 |
| 9 | 9.45 | 006-018-030-042-054-066-078-090-102-114 | Meet 7,8,apex (pole) |
| Hemisphere B | |||
| 1 | 81.11 | 003-009-015-021-027-033-039-045-051-057- 063-069-075-081-087-093-099-105-111-117 | Meet 1,2 on hemisphere A |
| 2 | 72.83 | 120-012-024-036-048-060-072-084-096-108 | Meet 1,2 on hemisphere A, 1 |
| 3 | 71.09 | 120-012-024-036-048-060-072-084-096-108 | Meet 1,2 |
| 4 | 63.29 | 003-009-015-021-027-033-039-045-051-057- 063-069-075-081-087-093-099-105-111-117 | Meet 1,2,3 |
| 5 | 45.35 | 003-009-015-021-027-033-039-045-051-057- 063-069-075-081-087-093-099-105-111-117 | Meet 3,4 |
| 6 | 41.51 | 120-012-024-036-048-060-072-084-096-108 | Meet 3,4,5 |
| 7 | 29.60 | 120-012-024-036-048-060-072-084-096-108 | Meet 5,6 |
| 8 | 25.79 | 006-018-030-042-054-066-078-090-102-114 | Meet 5,6,7 |
| 9 | 9.45 | 006-018-030-042-054-066-078-090-102-114 | Meet 7,8,apex (pole) |
This meetpoint design for a rose cut sphere yields a "true" sphere. All of the vertices are equidistant from its center. Begin by cutting a 20-sided cylindrical preform. The height of the preformed cylinder must be equal to or greater than its maximum width for you to have enough material when you get to the course 9 (pole) facets. When you cut the course 1 facets for the first hemisphere, create a level 'girdle' (equator) line at half the height of cylinder.
Transfer when you've finished the first hemisphere, and repeat the course 1-9 sequence on the second hemisphere.
If you cut a Rose Sphere 240-120 of your own, be sure and let me know what you've cut and how you made out.
