I love

Psalm 119:72
The law from Your mouth is more precious to me than thousands of pieces of gold and silver.

Psalm 19:10
They are more precious than gold, than much pure gold; they are sweeter than honey, than honey from the comb.

Proverbs 3:13-18
Blessed is the man who finds wisdom, the man who acquires understanding, . . .

Proverbs 8:11
For wisdom is more precious than rubies, and nothing you desire compares with her.

Proverbs 16:16
How much better to acquire wisdom than gold; to gain understanding is more desirable than silver.

Matthew 13:45, 46
Again, the kingdom of heaven is like a merchant in search of fine pearls. . . .

Ephesians 3:8
Though I am less than the least of all the saints, this grace was given me: to preach to the Gentiles the unsearchable riches of Christ,