χαλκωρυχεῖον
From LSJ
ἀμήχανον δὲ παντὸς ἀνδρὸς ἐκμαθεῖν ψυχήν τε καὶ φρόνημα καὶ γνώμην, πρὶν ἂν ἀρχαῖς τε καὶ νόμοισιν ἐντριβὴς φανῇ → hard it is to learn the mind of any mortal or the heart, 'till he be tried in chief authority | it is impossible to know fully any man's character, will, or judgment, until he has been proved by the test of rule and law-giving
English (LSJ)
τό,
A copper-mine, Thphr.Lap.25, Str.17.2.2, Plu. 2.659c, better written χαλκωρῠχ-ρύχιον, as in PPetr.3p.320 (iii B. C.), Str. l. c. (v. l.), Plu. l. c. (codd.).
