ChristianAnswers.Net WebBible Encyclopedia
Meaning: A rock or very hard mineral. The Hebrew word is “shamir” (Ezek. 3:9).
This archaic old English meaning of the word “adamant” is used only two times in the King James Bible. The meaning comes from the Greek word “adamas,” which means “diamond.” In the Bible, this stone is not referred to, but corundum or some kind of hard steel or very hard mineral. It is a symbol of firmness in resisting adversaries of the truth (Zechariah 7:12), and of hard-heartedness against the truth (Jeremiah 17:1).