Ayn Rand - designed by Carl R. Downey alckytxn@flash.net ©1998 | |
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Created to fit a piece of medium Bolivian amethyst | |

Angles for R.I. = 1.54 | 48 facets + 10 facets on girdle = 58 |

1-fold symmetry | 96 index |

L/W = 1.155 T/W = 0.647 T/L = 0.561 P/W = 0.410 C/W = 0.158 | H/W = (P+C)/W+0.02 = 0.588 P/H = 0.697 C/H = 0.269 |

Vol./W^3 = 0.187 | Brightness at 0 degrees tilt for R.I. = 1.54
COS = 50.5 ISO = 68.2 |

Pavilion | |||
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1 | 90.00 | 96-04-08-12-16-84-88-92 | if you cut 80 & 20 too you will have.. |

2 | 90.00 | 64 | ..an 'edge' to cut down to for... |

3 | 90.00 | 32 | ...the sides |

4 | 50.00 | 32 | establish girdle |

5 | 50.00 | 64 | level girdle at point |

6 | 43.50 | 96-04-08-12-16-84-88-92 | finish leveling girdle |

7 | 42.50 | 02-06-10-14-86-90-94 | meet at girdle facets as shown |

Crown | |||

a | 55.00 | 96-04-08-12-80-84-88-92 | this is all fairly straight forward |

b | 55.00 | 32 | |

c | 55.00 | 64 | |

d | 40.00 | 96-04-08-12-80-84-88-92 | |

e | 40.00 | 64 | |

f | 40.00 | 32 | |

g | 20.00 | 96-04-08-12-80-84-88-92 | |

h | 20.00 | 64 | |

i | 20.00 | 32 | |

T | 0.00 | Table | meet g-g-i |

This cut may lend itself to carving or 'dimples' on the large pavilion facets. |