lead: the soft, heavy, dull gray metal, the cheapest of the common metals and valued almost entirely for its weight
Lead was the least valuable metal people worked with and the heaviest they handled in quantity. It is soft enough to score with a knife, it melts in an ordinary hearth fire, and it will not hold an edge, so nobody ever made a tool or a weapon from it. What it was good for was weight and the fact that it pours. That is why it shows up in the Bible as the thing that sinks, the thing that seals a container shut, and the thing run into carved letters so writing will not wear away.
Whenever a list of metals is drawn up, lead comes at the end of it, after gold, silver (כֶּסֶף), bronze (נְחֹשֶׁת), iron (בַּרְזֶל), and tin (בְּדִיל). The order is roughly a price list, and lead sits at the bottom of it. Numbers counts it among the spoil that has to be passed through fire before Israel may keep it, and Ezekiel counts it among the goods that came into Tyre's markets from the far west.
The refiner's furnace gives the word its sharpest use. To get clean silver out of ore, smelters melted it together with lead: the lead took up the impurities and burned off, and what stayed behind was pure. Both Jeremiah and Ezekiel take that scene and turn it on their own people. In Jeremiah the bellows roar and the lead is used up and still nothing pure comes out of the fire. In Ezekiel the people are not the silver in the crucible at all; they are the cheap metal thrown in with it.
Zechariah's vision uses lead for nothing but its weight: a heavy disk lifted off a basket, then dropped back over the mouth of it so the woman inside cannot climb out. Lead is what you use when you want something to stay put.
Nuances
What role the lead plays in Job's wish for a permanent inscription: filler poured into rock-cut letters, or a lead sheet written on directly.
- majorityThe lead was melted and run into letters already cut in the rock, so that the inscription would stand out and endure.; BDB (Brown-Driver-Briggs), s.v. עפרת; David J. A. Clines, Job 1-20, Word Biblical Commentary 17 (1989), on Job 19:23-24
- minorityThe verse names two writing media rather than one process: an iron stylus, and a sheet of lead inscribed with it.; Edouard Dhorme, A Commentary on the Book of Job (1967), on Job 19:24