dundasite

例句：

1. 1. Dundasite is a rare mineral that can be found in the Earth's mantle.
   登达石是一种稀有矿物，可以在地球的地幔中找到。
2. 2.The minerals in the Dundasite deposit have been studied for their potential as building materials.
   登达石矿中的矿物已被研究用于作为建筑材料的潜在价值。
3. 3. Dundasite is often used in jewelry making due to its beautiful color and hardness.
   由于其美丽的颜色和硬度，登达石常被用于珠宝制作。