carat|carats

这枚戒指是22克拉的黄金制成的。

This ring is made of 22-___carat gold.

这块红宝石重3克拉，相当于0.6克。

The ruby weighs 3 ___carats, which equals 0.6 grams.

这枚戒指是24k金的，非常纯净。

This ring is made of 24 ___carat gold, which is very pure.