LXX2012(i)
7 Thus the Lord showed me; and behold, he stood upon a wall of adamant, and in his hand [was] an adamant.
8 And the Lord said to me, What see you, Amos? And I said, An adamant. And the Lord said to me, Behold, I appoint an adamant in the midst of my people Israel: I will not pass by them any more.