Germanium is a chemical element with the symbol Ge and atomic number 32. It is a lustrous, hard-brittle, grayish-white metalloid in the carbon group, chemically similar to its group neighbours silicon and tin.
G 3621 (OTTO) Germanium pieces, 1-5 mm, 99.999% Cas 7440-56-4 - used as a semiconductor in transistors and various other electronic devices.