stewartite

例句：

1. 1.The mineral is named after the famous Scottish sculptor Sir Walter Raleigh.
   这种矿物是以著名的苏格兰雕塑家沃尔特·雷利爵士命名的。
2. 2. This rare mineral has been found in only a few places around the world.
   这种稀有矿物仅在世界上少数地方被发现。
3. 3. The Stewartite deposits are known for their unique crystal structures.
   斯图尔特石矿床以其独特的晶体结构而闻名。