1778 W. Pryce i. i. 64 Yellow, or mundicky Copper Ore, they call Pyrites Ærosus.
1818 W. Phillips 202 If iron pyrites abound, the load is said to be mundicky.
1864 A. K. H. Jenkin 53 Immense quantities of rich tin ground are also laid open at the 30 and 40 fathom levels, but the tin is mundicky.
1879 12 June 6/5 The cunning agent who thought to pass in his irony or mundicky ore as pure tin.