“Who can find a virtuous woman? for her price is far above rubies” (Proverbs 31:10).

Job 28:18

No mention shall be made of coral, or of pearls: for the price of wisdom is above rubies.

Proverbs 3:15

She (wisdom) is more precious than rubies: and all the things thou canst desire are not to be compared unto her.

Proverbs 8:11

For wisdom is better than rubies; and all the things that may be desired are not to be compared to it.

Proverbs 20:15

There is gold, and a multitude of rubies: but the lips of knowledge are a precious jewel.

Only two things in Scripture are said to be much more valuable than rubies — wisdom, and a wise wife.  A wise man seeks a wise wife, and when he finds her, values her highly.