onyx marble

例句：

1. 1. The ancient palace in the city is made of onyx marble.
   这个城市里的古老宫殿是用乌木大理石建造的。
2. 2. The onyx marble carving is a masterpiece of Chinese art.
   乌木大理石雕刻是中国艺术的杰作。
3. 3.The onyx marble floor was polished to a shine.
   乌木大理石地板被打磨得闪闪发光。