40.037 Duke

  • Long, Robert H;Seattle F Design, Mar 1993, p1;
  • L/W=1.900
  • H/W=0.804
  • Vol/W^3=0.474
  • 41+6 Facets
  • Gear: 96
  • Remarks: Same outline as 40.035A Duchess
6 12 18 24 30 36 42 48 54 60 66 72 78 84 90 <96> L L T T W W U U C C P P c1 c2 c3 c4 c6 c7 c5 c1 c2 c3 c4 c6 c5 g1 g2 p1 p2 p3 p4 p5 p1 p2 p3 p4 c1 c4 c5 c1 c2 c3 c4 c6 c7 c5 c1 c2 c3 c4 c6 c5 g1 g2 p1 p2 p3 p4 p5 p1 p2 p3 p4 c1 c4 c5 PC40.037 New design by Robert H. Long. Name comes from The Duchess Cut(TM) outline Use CAM preform for outline Angles for R.I. = 1.540 41 facets + 6 girdles 2-fold, mirror-image symmetry; 96 index L/W = 1.900 T/W = 0.974 U/W = 0.500 P/W = 0.572 C/W = 0.198 Vol/W³ = 0.474 pc40037.asc
g190.00°14-34-62-82 
g290.00°24-72 
p141.00°12-36-60-84Cut to TCP
p260.00°14-34-62-82Meet p1p1g1g1
p347.00°18-30-66-78Meet g1g2p2
p441.00°14-24-34-62-72-82Meet p1p2p3(14-34-62-82), form PCP
p563.04°24-72Level girdle, meet p3p3p4
c145.00°14-34-62-82 
c251.00°24-72 
c335.00°18-30-66-78 
c431.24°12-36-60-84 
c615.00°24-72 
c70.00°Table 
c525.83°14-34-62-82 

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