Arsenic metal is a metalloid element. Arsenic metal is a silvery-grey solid at normal pressure and temperature, and easily oxidize turning black. Arsenic metal was and is still used as a pharmaceutical and it was the main ingredient in the first chemotherapy. Today, Arsenic metal is mainly used in lead alloys and for special semiconductors.
Arsenic metal is very dangerous for health, that's why you can get only a sample permanently sealed in acrylic (vial or cube).