κρυστάλλιον
From LSJ
ἵνα οὖν μηδ' ἐν τούτῳ δῷ αὐτοῖς λαβήν (Photius, Fragments on the Epistle to the Romans 483.26) → so that he doesn't give them even here a handle (= an opportunity for refutation)
English (LSJ)
τό,
A = ψύλλιον, Dsc.4.69 (Sicel). II rock-crystal, in pl., PHolm.11.43, Anon.Alch.p.359 B.
