Boyd’s Bible Dictionary:

Early known, imported and used by Hebrews
(Ex. 15:10; Num. 31:22; Job 19:24; Ezek. 27:12).

Concise Bible Dictionary:

The well-known heavy metal. It is mentioned as early as Exodus 15:10, where its weight is alluded to. Job speaks of it, apparently, as being used for filling in the engravings on stones. It was no doubt also used for making solder (Num. 31:22; Job 19:24; Jer. 6:29; Ezek. 22:18,20; Ezek. 27:12; Zech. 5:7-8).
Lead with Pyrochroite