30.012 Accordian

  • Giacomini, Afton;Gems & Minerals, Aug 1972, p38;
  • L/W=1.051
  • H/W=0.871
  • Vol/W^3=0.310
  • 51+5 Facets
  • Gear: 120
6 12 18 24 30 36 42 48 54 60 66 72 78 84 90 96 102 108 114 <120> W W U U L L T T C C P P PC 30.012 Accordian Giacomini, Afton; Gems & Min, Aug 72, p38 Angles for R.I. = 1.540 51 facets + 5 girdles 5-fold, mirror-image symmetry; 120 index L/W = 1.051 T/W = 0.557 U/W = 0.557 P/W = 0.661 C/W = 0.189 Vol/W³ = 0.310 pc30012.asc