Brilliant Pear
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| 1.20 ‘Round Brilliant’ Pear – designed by Jeff R. Graham jeff@faceters.com ©1998 | |
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| Angles for R.I. = 1.62 | 58 facets + 14 facets on girdle = 72 |
| 1-fold, mirror-image symmetry | 96 index |
| L/W = 1.209 T/W = 0.670 T/L = 0.554 P/W = 0.414 C/W = 0.165 | H/W = (P+C)/W+0.02 = 0.599 P/H = 0.691 C/H = 0.275 |
| Vol./W^3 = 0.228 | Brightness at 0 degrees tilt for R.I. = 1.62 COS = 72.2{9ed71289f2927c7f90a8e3141bf36c77d4cc6b912c25f0bd44558f2f604ca447} ISO = 88.3{9ed71289f2927c7f90a8e3141bf36c77d4cc6b912c25f0bd44558f2f604ca447} |
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| Pavilion | |||
|---|---|---|---|
| P1 | 41.28 | 15-21-27-33-39-45-51-57-63-69-75-81 | Cut to centerpoint. |
| P2(G) | 90.00 | 15-21-27-33-39-45-51-57-63-69-75-81 | Cut a level girdle, meet P1. |
| P3 | 39.30 | 11-85 | Cut to centerpoint. |
| P4(G) | 90.00 | 11-85 | Cut to meet P3. |
| P5 | 39.79 | 23-25-35-37-47-49-59-61-71-73 | Cut to centerpoint, meet girdle. |
| P6 | 39.66 | 14-82 | Cut to centerpoint, meet girdle. |
| P7 | 39.03 | 13-83 | Cut to centerpoint, meet girdle. |
| P8 | 39.00 | 22-74 | Cut to meet P1, P5, P6. Note1 |
| Crown | |||
| C1 | 38 | 11-15-21-27-33-39-45-51-57-63-69-75-81-85 | Cut to meet girdle. |
| C2 | 34.00 | 24-36-48-60-72 | Cut to meet girdle. |
| C3 | 18.00 | 18-30-42-54-66-78 | Cut to meet C1,C2. |
| T | 0.00 | Table | Cut to meet C3,C4. |
| C4 | 35.26 | 10-86 | Cut to meet C1,C3. |
| Note1: P8 can be easily omitted on smaller stones. Just cut P6, P7 to centerpoint (lower their angles very slightly). On a smaller stone you won’t have to do anything… | |||
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