Who can find a virtuous wife ' for her worth is far above Jewels and rubies ( Proverbs 31:10 )
A virtuous Woman is a priceless gift to her generation and a divine vessel for God's use. her life shows forth the quality of God fearing and God loving woman who sees God as her ultimate and she works/walks according to his commandments.
she is considered a gem because of the Godly qualities she possesses.