13.003 Triad

  • Giacomini, Afton;Gems & Minerals, Oct 1971, p38;
  • L/W=1.001
  • H/W=0.841
  • Vol/W^3=0.262
  • 85+12 Facets
  • Gear: 96
8 16 24 32 40 48 56 64 72 80 88 <96> W W U U L L T T C C P P PC 13.003 Triad Giacomini, Afton: Gems & Min, OCt 71, p38 Angles for R.I. = 1.540 85 facets + 12 girdles 3-fold, mirror-image symmetry; 96 index L/W = 1.001 T/W = 0.416 U/W = 0.415 P/W = 0.641 C/W = 0.180 Vol/W³ = 0.262 pc13003.asc