Deuteronomy 8:7-9

The mining of copper

See also

Job 28:2-10
Ezekiel 22:20-21

The smelting of copper

See also

Ezekiel 22:18; 24:11
Matthew 10:9

Coins made of copper

See also

Mark 12:41-42

See also

pp Lk 21:1-2

Coins of various denominations were made of copper in late OT and in NT times.

4303 metals
4306 minerals
4312 bronze
4333 gold
4336 iron
4345 metalworkers
4348 mining
4351 refining
4363 silver
5260 coinage