Galenite crystals. Galenite (galena) is a lead sulphide and is the most important ore of lead. It occurs as a mass of dense,dark grey or glossy crystals and is one of the most abundant and widely distributed sulphide minerals. Galenite is a semiconductor and was used in early wireless communication systems as the crystal in crystal radio sets | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Wiersma, Dirk |
Taille de l’image : | 5138 px × 3425 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |