freibergite

例句：

1. 1. The mineral is found in the region and has been used for centuries as a building material.
   这种矿物在该地区被发现，并被用作数百年的建筑材料。
2. 2.The stone was discovered by a local geologist who believed it had healing properties.
   这块石头是由一位当地的地质学家发现的，他认为它具有治疗性质。
3. 3. The freestone has a unique texture that makes it ideal for carving into decorative objects.
   这种岩石具有独特的纹理，使其成为雕刻成装饰品的理想选择。