jewel
/ˈdʒuːəl/noun
1- a precious stone, typically a single crystal or piece of a hard lustrous or translucent mineral cut into shape with flat facets or smoothed and polished for use as an ornament宝石。
1.1
- （一般作jewels）an ornament or piece of jewellery containing such a stone or stones宝石饰物; 首饰。
1.2
- a hard precious stone used as a bearing in a watch, compass, or other device（钟表、指南针等仪器用）宝石轴承, 钻。
1.3
- a very pleasing or valued person or thing; a very fine example令人喜爱的人（或物）; 令人尊重的人（或物）; 典范, 模范：
she was a jewel of a nurse.
她是一个极好的护士。
短语
the jewel in the（或one's）crown
- the most valuable or successful part of something最珍贵（或成功）之事, 王冠上的宝石：
quality education was once the jewel in Britain's crown.
优良教育曾是大不列颠王国最成功的方面。
词源
Middle English: from Old French joel, from jeu 'game, play', from Latin jocus 'jest'.