13.108A Tri Polar (for small stones)

  • Attaway, Stephen;SDMGS Pegmatite, Oct 1995, p26;
  • L/W=1.040
  • H/W=0.730
  • Vol/W^3=0.265
  • 109+18 Facets
  • Gear: 96
8 16 24 32 40 48 56 64 72 80 88 <96> L L U U W W T T C C P P PC 13.108A Tri Polar for Small Stones Attaway, Stephen: SDMGS Pegmatite, Oct 95, p26 Similar to 13.005. Angles for R.I. = 1.540 109 facets + 18 girdles 3-fold, mirror-image symmetry; 96 index L/W = 1.040 T/W = 0.631 U/W = 0.604 P/W = 0.537 C/W = 0.178 Vol/W³ = 0.265 pc13108a.asc