| [ About USFG | | Join Our Discussion Group | | Faceting FAQs | | Faceting Diagrams | | Conferences and Competions | | Other Resources ] |
Sixty One
![]()
GemCad Ray Traces for RI = 1.61 Random Model Cosine Model ISO Model
Sixty One
Designed by Charles W. Covill covill@email.msn.comAngles for R.I. = 1.61 53 facets + 8 facets on girdle = 61 4-fold, mirror-image symmetry 96 index L/W = 1.000 T/W = 0.580 T/L = 0.580 P/W = 0.416 C/W = 0.117 H/W = (P+C)/W+0.02 = 0.552 P/H = 0.753 C/H = 0.211 Vol./W^3 = 0.142 Brightness at 0 degrees tilt for RI = 1.61
COS = 50.9 ISO = 64.7
Pavilion g 90.00 09-15-33-39-57-63-81-87 1 47.00 09-15-33-39-57-63-81-87 2 42.00 06-18-30-42-54-66-78-90 3 44.50 11-13-35-37-59-61-83-85 Crown a 40.00 09-15-33-39-57-63-81-87 b 29.00 96-24-48-72 c 33.00 11-13-35-37-59-61-83-85 d 23.00 09-15-33-39-57-63-81-87 t 0.00 Table
| [ About USFG | | Join Our Discussion Group | | Faceting FAQs | | Faceting Diagrams | | Conferences and Competions | | Other Resources ] |