42.017 Brilliant Decagon

  • Larson, Henry E;Gems & Minerals, May 1981, p32;
  • L/W=1.051
  • H/W=0.707
  • Vol/W^3=0.277
  • 56+10 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 42.017 Brilliant Decagon Larson, Henry E; Gems & Min, May 81, p32 Angles for R.I. = 1.620 56 facets + 10 girdles 5-fold, mirror-image symmetry; 120 index L/W = 1.051 T/W = 0.528 U/W = 0.502 P/W = 0.449 C/W = 0.234 Vol/W³ = 0.277 pc42017.asc