malthacite

例句：

1. 1.The malthacite is a rare and valuable mineral.
   这种马特卡伊特是一种稀有且珍贵的矿物。
2. 2. The museum exhibits malthacite from around the world.
   该博物馆展示了来自世界各地的马特卡伊特。
3. 3.The malthacite has been used in ancient medicine for its healing properties.
   这种马特卡伊特在古代医学中被用于其治疗属性。