Worlds of David Darling
Encyclopedia of Science
   
Home > Encyclopedia of Science

galena




galena
Galena. Credit: Mineral Information Institute
A gray, brittle mineral, essentially lead (II) sulfide (PbS), the principal ore of lead. It forms cubic or octahedral crystals, and also occurs as granular masses. Deposits of galena, also called "lead glance," have been worked worldwide for their lead. Galena is found especially in hydrothermal veins and as a replacement for limestone and dolomite rocks. Hardness 2.5–2.7, relative density 7.5.


Related category

   • GEOLOGY AND PLANETARY SCIENCE