כַּדְכֹּד‎ (kadkôd|kad-kode'|noun|masculine|ruby)
[Heb] כַּדְכֹּד‎ ETCBC: כַּדְכֹּד‎ (subs|ruby) OSHL: k.an.ad TWOT: 953c GK: H3905 Greek: ἴασπις
Derivation: from the same as כַּד‎ in the sense of striking fire from a metal forged;
Strong's: a sparkling gem, probably the ruby
KJV: agate.