Emery

Emery in the UPDV is a hard abrasive stone, the hardest substance available in the biblical world, used three times in the prophets as the figure for unyielding hardness — in a prophet's forehead (Ezekiel), an engraving point (Jeremiah), and a people's heart (Zechariah).

The Prophet's Forehead Made Like Emery

When Yahweh sends Ezekiel to a rebellious house, he steels the prophet's face against their looks: "As emery, harder than flint I have made your forehead: don't fear them, neither be dismayed at their looks, though they are a rebellious house" (Eze 3:9). Emery is named explicitly as harder than flint, and the gift of that hardness is set against the prophet's fear of his audience.

An Emery Engraving Point

In Jeremiah, the same substance names the tool that inscribes guilt permanently: "The sin of Judah is written with a pen of iron, [and] with the point of emery: it is graven on the tablet of their heart, and on the horns of your⁺ altars" (Jer 17:1). The image is permanence — a record cut so deep it cannot be effaced. What iron is to the pen, emery is to the point: the hardest material available for engraving.

A People's Heart Made Like Emery

In Zechariah the same image moves to the human heart, but as judgment on those who refuse the word: "Yes, they made their hearts as emery, lest they should hear the law, and the words which Yahweh of hosts had sent by [his Speech] by the former prophets: therefore there came great wrath from Yahweh of hosts" (Zec 7:12). The same stone that is divine gift on the prophet's forehead and the engraver's point is here self-imposed shielding against hearing, and "great wrath" follows.