Seen in official portraits and stamps, a diamond and ruby necklace owned by Eva Peron was sold at a Christie’s auction for $466,700, more than double the estimate, on Wednesday. An antique from the 19th century, the necklace and gems survived the dismantling that would often occur as fashions and tastes changed. It is not known how Peron acquired the necklace nor who the selling owner was. The buyer was “a member of the jewelry industry in Asia.”