Cubic Galena Crystals
Lead Sulfide, PbS
Crystal System: Cubic
- Galena is widely distributed and the main ore mineral of lead. It typically occurs in
hydrothermal deposits and pegmatites where it is associated with bournonite, sphalerite,
argentite, chalcopyrite, and tetrahedrite, and with gangue minerals such as fluorite,
quartz, dolomite, barite, and calcite. Galena also occurs in metamorphic and
sedimentary deposits. It occurs as columnar replacements in limestones and dolomites.
- Galena crystals are most frequently found as compact and granular masses. They are
also common as cubic crystals, with octahedral forms being rarer. Galena crystals
typically exhibit an opaque lead grey color with a bright metallic luster, which may
darken or blacken over time due to the oxidation of lead.
Rocks from Bob's Collection
Index of Specimen Images
Table of Contents