LSJ
όνος, ἡ, chalcedony, Apoc. 21.19.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)
TBESG
χαλκηδών, -όνος, ὁ
chalcedony, 'supposed to denote a green silicate of copper found in the mines near Chalcedon ' (Swete): Rev.21:19.†
(AS)
Translators Brief lexicon of Extended Strongs for Greek based on Abbot-Smith, A Manual Greek Lexicon of the New Testament (1922) (=AS), with corrections and adapted by Tyndale Scholars