Proverbs 25:4
Take ye away the dross from the silver, and a vessel shall come forth for the goldsmith.
Proverbs 17:3
The crucible for silver and the furnace for gold: and Jehovah tries hearts.
Isaiah 1:25-27
And I will turn back my hand upon thee, end I will straiten thy dross according to pureness, and I will remove all thine alloy:
2 Timothy 2:20-21
And in a great house there is not only gold and silver vessels, but also wood and earthen; and some truly for honour, and some for dishonour.
Ezekiel 22:18
Son of man, the house of Israel became to me for dross: all they brass and alloy, and iron, and lead, in the midst of the furnace; they were drosses of silver.
Malachi 3:2-3
And who enduring the day of his coming? and who standing in his being seen? for he is as the fire of the crucible, as the alkali of the fuller.
1 Peter 1:7
That the proof of your faith, much more precious than perishing gold, and being tried by fire, might be found to praise and honour and glory at the revelation of Jesus Christ: