2 sentences

1. 这是皇冠上的明珠。

   zhè shì huáng​guān shàng de míng​zhū.

   It's the crown jewel.

   Source: OpenSubtitles

2. 从深海中打捞上来的天然明珠通常价值连城。

   cóng shēn​hǎi zhōng dǎ​lāo shàng​lái de tiān​rán míng​zhū tōng​cháng jià​zhí​lián​chéng.

   Natural pearls salvaged from the deep sea are often priceless.

   Source: Dong Chinese Dictionary