fulminating gold

from The Collaborative International Dictionary of English v.0.48

Fulminate \Ful"mi*nate\, n. [Cf. P. fulminate. See {Fulminate},
   v. i.] (Chem.)
      (a) A salt of fulminic acid. See under {Fulminic}.
      (b) A fulminating powder.
          [1913 Webster]

   {Fulminate of gold}, an explosive compound of gold; -- called
      also {fulminating gold}, and {aurum fulminans}.
      [1913 Webster]