What does the word jewel mean?

Usage examples for jewel

  1. My husband was the apple of her eye, the jewel on her bosom. – The Home and the World by Rabindranath Tagore
  2. But the setting was not the jewel. – The Marquis of Lossie by George MacDonald
  3. Where could the jewel be? – Two Little Women on a Holiday by Carolyn Wells