1.7 Butterfly Ring of Fire Opt

  • Hamer| John;Personal communication;
  • L/W=1
  • H/W=0.322
  • Vol/W^3=0.155
  • 112+16 Facets
  • Gear: 96
  • Remarks: For thin| light materials.
6 12 18 24 30 36 42 48 54 60 66 72 78 84 90 <96> L L U U W W T T C C P P g a b b c c d e f h i k m n o p s r a b g a b b c c d e f h i k m n o p s r a b PC 01.700 Butterfly Ring of Fire. Opt. Designed by J Hamer. December 2014. Copyright assigned to the public domain. Angles for R.I. = 1.540 112 facets + 16 girdles 16-fold, mirror-image symmetry; 96 index L/W = 1.000 T/W = 0.701 U/W = 0.701 P/W = 0.233 C/W = 0.069 Vol/W³ = 0.155 pc01700.asc
g90.00°96-06-12-18-24-30-36-42-48-54-60-66-72-78-84-90Size stone
a47.00°96-06-12-18-24-30-36-42-48-54-60-66-72-78-84-90Position girdle
b43.00°03-09-15-21-27-33-39-45-51-57-63-69-75-81-87-93Meet a, g
c12.00°96-04-08-12-16-20-24-28-32-36-40-44-48-52-56-60-64-68-72-76-80-84-88-92Determine wingspan. Polish all pavilion facets
d14.50°35-61Meet c, b. Leave remaining facets frosted
e14.50°40-56Meet c, d
f14.50°43-53Meet c, e
h14.50°48Cout by eye
i14.50°26-70Meet c, d, b
k14.50°23-73Meet c, i
o14.50°13-16-19-77-80-83Meet c, k
p14.50°08-88Meet c, o
s13.30°18-78Cut by eye
r13.30°01-95Meet c, p
 24.70°96-06-12-18-24-30-36-42-48-54-60-66-72-78-84-90 
 22.50°03-09-15-21-27-33-39-45-51-57-63-69-75-81-87-93 
 0.00°Table 

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