οὐ τῷ πλήθει ἀλλὰ τῷ ἀξιώματι → not in numbers but in quality
See metal.
silver ore: P. ἀργυρῖτις, ἡ (Xen.), or use V. ὑπάργυρος πέτρα, ἡ (Euripides, Cyclops 294).
