They made their hearts as hard as flint and would not listen to the law or to the words that the LORD Almighty had sent by his Spirit through the earlier prophets. So the LORD Almighty was very angry.
NIV
Yes, they made their hearts as an adamant stone or diamond point, lest they should hear the law and the words which the Lord of hosts had sent by His Spirit through the former prophets. Therefore there came great wrath from the Lord of hosts.
AMP
Yea, they made their hearts as an adamant stone, lest they should hear the law, and the words which the LORD of hosts hath sent in his spirit by the former prophets: therefore came a great wrath from the LORD of hosts.
KJV
"I will make your forehead like the hardest stone, harder than flint. Do not be afraid of them or terrified by them, though they are a rebellious house."
NIV
Like an adamant harder than flint or a diamond point have I made your forehead; fear them not, neither be dismayed at their looks, for they are a rebellious house. [Isa. 50:7; Jer. 1:18; 15:20; Mic. 3:8.]AMP
As an adamant harder than flint have I made thy forehead: fear them not, neither be dismayed at their looks, though they be a rebellious house.
KJV
You were in Eden, the garden of God; every precious stone adorned you: carnelian, chrysolite and emerald, topaz, onyx and jasper, lapis lazuli, turquoise and beryl. Your settings and mountings were made of gold; on the day you were created they were prepared.
NIV
You were in Eden, the garden of God; every precious stone was your covering, the carnelian, topaz, jasper, chrysolite, beryl, onyx, sapphire, carbuncle, and emerald; and your settings and your sockets and engravings were wrought in gold. On the day that you were created they were prepared. [Gen. 3:14, 15; Isa. 14:12-15; Matt. 16:23.]AMP
Thou hast been in Eden the garden of God; every precious stone was thy covering, the sardius, topaz, and the diamond, the beryl, the onyx, and the jasper, the sapphire, the emerald, and the carbuncle, and gold: the workmanship of thy tabrets and of thy pipes was prepared in thee in the day that thou wast created.
KJV
"Judah's sin is engraved with an iron tool, inscribed with a flint point, on the tablets of their hearts and on the horns of their altars."
NIV
THE SIN of Judah is written with a pen or stylus of iron and with the point of a diamond; it is engraved on the tablets of their hearts and on the horns of their altars
AMP
The sin of Judah is written with a pen of iron, and with the point of a diamond: it is graven upon the table of their heart, and upon the horns of your altars;
KJV