13.137 Trilnot

  • Covill, Charles;Lapidary Journal, Apr 1998, p83;
  • L/W=1.006
  • H/W=0.646
  • Vol/W^3=0.217
  • 55+18 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 13.137 Trilnot Covill, Charles; Lapidary J, Apr 98, p83 Angles for R.I. = 1.610 55 facets + 18 girdles 3-fold, mirror-image symmetry; 96 index L/W = 1.006 T/W = 0.584 U/W = 0.584 P/W = 0.482 C/W = 0.143 Vol/W³ = 0.217 pc13137.asc