Bulk commercial germanium is sold in ingot bars: This is the broken end of one, showing its internal crystal structure. Germanium is used in light emitting diodes and semiconductors, just like silicon above it.
Scroll down to see examples of Germanium.
Larger | Spin | 3D Old germanium diode.
Larger | Spin | 3D Germanium crystal.
Larger | Spin | 3D Germanium boule.
Larger | Spin | 3D Germanium mineral supplement.
Larger | Spin | 3D Broken sputtering target.
Larger | Spin | 3D Germanium button.
Larger | Spin | 3D Bath bar.
Larger | Spin | 3D Bath salts.
Larger | Spin | 3D Infrared lenses.
Larger | 3D Cast ingot.
Larger Antique-style crystal radio kit.
Larger | 3D Hyper-pure germanium crystal.
Larger | Spin | 3D Germanium Ore.