Beryllium is a grey metal that is poisonous. It is solid at room temperature, and it is hard and non-magnetic. Beryllium is considered to be an alkaline earth metal.
Beryllium has a melting point of 2,349 degrees Fahrenheit and a boiling point of 4,476 degrees Fahrenheit. It does not oxidize in air and it is able to scratch glass. Beryllium is used to make windows for X-ray tubes because it is transparent to X-rays. When beryllium is alloyed with copper, it produces beryllium bronze. Beryllium bronze is a wear resistant metal. Beryllium alloyed with nickel is used to make non-sparking tools and springs. Beryllium is found in emeralds and a gem known as aquamarine.