gem

詞型變化：

動詞過去式:gemmed 過去分詞:gemmed 現在分詞:gemming 第三人稱單數:gems 

詞意辨析：

jewel, jewellery, stone, gem

這些名詞均有“寶石”之意。
jewel: 多指貴重的寶石，是經過切削打磨，通常鑲嵌在胸針、項鍊或其它裝飾物上的玉。
jewellery: 是珠寶的總稱，泛指各類珠寶，既指佩帶的或衣服上的珠寶飾物，又指用普通金屬、塑膠或假寶石製作的裝飾物。
stone: 特彆強調稀少罕見或值錢的礦物。
gem: 指經切割、磨光的寶石，引申指珍品、佳作。gem

英文解釋：

名詞 gem:

1. a crystalline rock that can be cut and polished for jewelry
   同義詞：gemstone, stone
2. art highly prized for its beauty or perfection
   同義詞：treasure
3. a person who is a brilliant and precious as a piece of jewelry
   同義詞：jewel
4. a sweet quick bread baked in a cup-shaped pan
   同義詞：muffin
5. a precious or semiprecious stone incorporated into a piece of jewelry
   同義詞：jewel, precious stone

　

相關句子：

1. A smooth, lustrous, variously colored deposit, chiefly calcium carbonate, formed around a grain of sand or other foreign matter in the shells of certain mollusks and valued as a gem.
   珍珠在幾種軟體動物的貝殼中，圍繞著一粒沙子或其他外來物質形成的一種光滑、有色澤、具有不同顏色且主要是碳酸鈣的沉積物，被珍視為寶石
2. The price of this gem is expensive -- as much so as astronomical figures.
   這個寶石的價格十分昂貴－－簡直是個天文數字。
3. My secretary is an absolute gem.
   我的秘書真是個難能可貴的人。