Adamant. This word is found twice in our version, Ezekiel 3:9; Zechariah 7:12, in both eases used metaphorically to signify firmness of character and purpose. The original word occurs again in Jeremiah 17:1, where it is translated "diamond," with which the writer's pen is said to be pointed. The term must signify some exceedingly hard stone; and diamond is the hardest we know.