1A gem, jewel, or precious stone — a mineral or organic material valued for its luster, hardness, or rarity, often used in jewelry such as rings and necklaces.
彼女は指輪に大きな宝石をはめている。
She has a large gem set in her ring.
博物館で古代の宝石が展示されている。
The museum is displaying ancient gemstones.
宝石の鑑定には専門家の知識が必要だ。
Appraising gemstones requires an expert's knowledge.
泥棒は店から宝石をいくつか盗んで逃げた。
The thief stole several gems from the store and fled.