锗

例句：

1. 1.Gemstones are made from minerals that contain germanium.
   宝石是由含有锗的矿物制成的。
2. 2. The research on germanium is crucial for understanding the properties of semiconductors.
   锗的研究对于理解半导体的性质至关重要。
3. 3. Gemstones have been used in jewelry for centuries due to their unique color and luster.
   由于其独特的颜色和光泽，宝石在珠宝中被使用了几个世纪。