χρυσωρυχεῖον
From LSJ
Ἔοικα γοῦν τούτου γε σμικρῷ τινι αὐτῷ τούτῳ σοφώτερος εἶναι, ὅτι ἃ μὴ οἶδα οὐδὲ οἴομαι εἰδέναι → I seem, then, in just this little thing to be wiser than this man at any rate, that what I do not know I do not think I know either
English (LSJ)
τό,
A gold-mine, Str.3.2.8; also χρῡσωρῠχ-ιον, τό, Agatharch.24. 2book on gold-mining, Olymp.Alch.p.87B.