41.018 Butterfly

  • Larson, H E;Gems & Minerals, Oct 1978, p27;
  • L/W=1.435
  • H/W=0.896
  • Vol/W^3=0.477
  • 45+8 Facets
  • Gear: 96
6 12 18 24 30 36 42 48 54 60 66 72 78 84 90 <96> W W U U L L T T C C P P PC 41.018 Butterfly Larson, H E; Gems & Min, Oct 78, p27 Angles for R.I. = 57.000 45 facets + 8 girdles 2-fold, mirror-image symmetry; 96 index L/W = 1.435 T/W = 0.913 U/W = 0.487 P/W = 0.646 C/W = 0.227 Vol/W³ = 0.477 pc41018.asc