07.172 Checkout BCA

  • Hamer, John;Personal communication;
  • L/W=1.000
  • H/W=0.736
  • Vol/W^3=0.322
  • 49+8 Facets
  • Gear: 96
  • Remarks: BCA=Below the Critical Angle
12 24 36 48 60 72 84 <96> W W T T L L U U C C P P a b c d e T a d 1 g1 g2 2 1 g1 2 a b c d e a b c d e T a d 1 g1 g2 2 1 g1 2 a b c d e PC 07.172 Checkout. BCA. Designed by J Hamer May 2015. Copyright assigned to the public domain. Angles for R.I. = 1.540 49 facets + 8 girdles 4-fold, mirror-image symmetry; 96 index L/W = 1.000 T/W = 0.224 U/W = 0.224 P/W = 0.495 C/W = 0.228 Vol/W³ = 0.322 pc07172.asc
140.99°96-06-12-18-24-30-36-42-48-54-60-66-72-78-84-90Cut to centerpoint
g190.00°96-24-48-72Size stone
g290.00°12-36-60-84Meet 1, g
239.50°08-16-32-40-56-64-80-88Meet 1, g1, g2
a42.82°12-36-60-84Level girdle
b35.18°06-18-30-42-54-66-78-90Meet a, g1, g2
c33.06°96-24-48-72Cut by eye. Same size as b
d21.00°12-36-60-84Meet b, a
e15.16°96-24-48-72Meet c, b, d
T0.00°TableMeet e, d

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