3 sentences

1. 这些珠宝价值连城。

   zhè​xiē zhū​bǎo jià​zhí​lián​chéng.

   These jewels are worth a fortune.

   Source: Dong Chinese Dictionary

2. 这件古董是价值连城的稀世珍宝。

   zhè jiàn gǔ​dǒng shì jià​zhí​lián​chéng de xī​shì zhēn​bǎo.

   This antique is a priceless treasure.

   Source: Dong Chinese Dictionary

3. 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