Min. Also fahlertz. [a. Ger. fahlerz, f. fahl ash-colored, yellowish + erz ore.] Grey copper or copper-ore, tetrahedrite.
1796. Kirwan, Elem. Min., II. 148–9. Karsten tells us, that the grey Ore from the Hartz is the real Fahlerz.
1808. Smithson, in Phil. Trans., XCVIII. 57. A combination of galena and fahlertz.
1880. trans. Wurtz’ Atom. Th., 141 The varieties of fahlerz.
