| 摘要 |
PROBLEM TO BE SOLVED: To develop and provide an Au alloy having a new characteristic color tone, i.e., having a noble special color tone of 'champagne gold'. SOLUTION: This Au alloy for ornament has a composition containing, by mass, 80 to 92% Au, 2 to 10% Pt and/or Pd, 3 to 9% Ag and 3 to 5 <5% Cu so as to be totaled to 100%.
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