3 sentences

1. 这枚钻戒重三克拉。

   zhè méi zuàn​jiè zhòng sān kè​lā.

   This diamond ring weighs three carats.

   Source: Dong Chinese Dictionary

2. 我也接受两克拉以上的珠宝和宝石。

   wǒ yě jiē​shòu liǎng kè​lā yǐ​shàng de zhū​bǎo hé bǎo​shí.

   I also accept jewelry and precious stones over two carats.

   Source: OpenSubtitles

3. 他买了一颗五克拉的钻，准备做成项链。

   tā mǎi le yī kē wǔ kè​lā de zuàn, zhǔn​bèi zuò chéng xiàng​liàn.

   He bought a five-carat diamond and plans to make it into a necklace.

   Source: Dong Chinese Dictionary