09.109 Americana

  • Covill, Charles W;Diagrams for Faceting v3 (1987) p52;
  • L/W=1.000
  • H/W=0.645
  • Vol/W^3=0.253
  • 81+16 Facets
  • Gear: 96
12 24 36 48 60 72 84 <96> W W T T L L U U C C P P PC 09.109 Americana Covill, Charles; Diag for Faceting V3 (1987) p52 Covill, Charles: Amer Gemcutter, Jan 90, p29 Angles for R.I. = 1.540 81 facets + 16 girdles 4-fold, mirror-image symmetry; 96 index L/W = 1.000 T/W = 0.770 U/W = 0.770 P/W = 0.535 C/W = 0.085 Vol/W³ = 0.253 pc09109.asc