ὅπλον μέγιστόν ἐστιν ἡ ἀρετή βροτοῖς → man's greatest weapon is virtue, virtue is the greatest weapon for mortals
See metal.
silver ore: P. ἀργυρῖτις, ἡ (Xen.), or use V. ὑπάργυρος πέτρα, ἡ (Eur., Cyclops 294).
