Proverbs 2:4
if you seek it like silver and search it out like hidden treasure,

Isaiah 48:10
See, I have refined you, but not as silver; I have tested you in the furnace of affliction.

Jeremiah 6:29-30
The bellows blow fiercely, blasting away the lead with fire. The refining proceeds in vain, for the wicked are not purged. / They are called rejected silver, because the LORD has rejected them.”

Ezekiel 22:18-22
“Son of man, the house of Israel has become dross to Me. All of them are copper, tin, iron, and lead inside the furnace; they are but the dross of silver. / Therefore this is what the Lord GOD says: ‘Because all of you have become dross, behold, I will gather you into Jerusalem. / Just as one gathers silver, copper, iron, lead, and tin into the furnace to melt with a fiery blast, so I will gather you in My anger and wrath, leave you there, and melt you. ...

Deuteronomy 8:9
a land where you will eat food without scarcity, where you will lack nothing; a land whose rocks are iron and whose hills are ready to be mined for copper.

1 Kings 7:46
The king had them cast in clay molds in the plain of the Jordan between Succoth and Zarethan.

1 Chronicles 22:14
Now behold, I have taken great pains to provide for the house of the LORD—100,000 talents of gold, 1,000,000 talents of silver, and bronze and iron too great to be weighed. I have also provided timber and stone, and you may add to them.

2 Chronicles 2:7
Send me, therefore, a craftsman skilled in engraving to work with gold and silver, with bronze and iron, and with purple, crimson, and blue yarn. He will work with my craftsmen in Judah and Jerusalem, whom my father David provided.

Psalm 12:6
The words of the LORD are flawless, like silver refined in a furnace, like gold purified sevenfold.

Psalm 66:10
For You, O God, have tested us; You have refined us like silver.

Proverbs 17:3
A crucible for silver and a furnace for gold, but the LORD is the tester of hearts.

Zechariah 13:9
This third I will bring through the fire; I will refine them like silver and test them like gold. They will call on My name, and I will answer them. I will say, ‘They are My people,’ and they will say, ‘The LORD is our God.’”

Malachi 3:3
And He will sit as a refiner and purifier of silver; He will purify the sons of Levi and refine them like gold and silver. Then they will present offerings to the LORD in righteousness.

Matthew 13:44
The kingdom of heaven is like treasure hidden in a field. When a man found it, he hid it again, and in his joy he went and sold all he had and bought that field.

Luke 12:33-34
Sell your possessions and give to the poor. Provide yourselves with purses that will not wear out, an inexhaustible treasure in heaven, where no thief approaches and no moth destroys. / For where your treasure is, there your heart will be also.