כַּדְכֹּד kadkôd

Meaning

a sparkling gem, probably the ruby

In the King James Version: agate.

Derivation: from the same as H3537 (כַּד) in the sense of striking fire from a metal forged;

Where it is used

• Isaiah 54:12 I will make your pinnacles of rubies, your gates of sparkling jewels, and all your walls of precious stones.
• Ezekiel 27:16 Aram was your customer because of your many products; they exchanged turquoise, purple, embroidered work, fine linen, coral, and rubies for your wares.