οὐκ ἔστι γῆρας τοῦδε τοῦ μιάσματος → that pollution never wears out, that pollution can never grow old
subs.
Ar. and P. λίθος, ὁ or ἡ, P. λιθίδιον, τό. See Plat., Phaedo, 110D-E for reference to gems. See also jewel. v. trans. Use P. and V. ποικίλλειν.