Galena - Large Chunk (2-3 inch)

Galena, also called lead glance, is the natural mineral form of lead(II) sulfide. It is the most important ore of lead and an important source of silver.  Galena is one of the most abundant and widely distributed sulfide minerals. It crystallizes in the cubic crystal system often showing octahedral forms. It is often associated with the minerals sphalerite, calcite and fluorite.  Within the weathering or oxidation zone galena alters to anglesite (lead sulfate) or cerussite (lead carbonate). Galena exposed to acid mine drainage can be oxidized to anglesite by naturally occurring bacteria and archaea, in a process similar to bioleaching.  One of the oldest uses of galena was as kohl, which, in Ancient Egypt, was applied around the eyes to reduce the glare of the desert sun and to repel flies, which were a potential source of disease.  Galena is the primary ore of lead, which is mainly used in making lead–acid batteries; however, significant amounts are also used to make lead sheets and shot. Galena is often mined for its silver content, e.g., at the Galena Mine in northern Idaho.  Galena was even used in crystal radio receivers.  Makes an excellent addition to any earth science classroom for decoration, or for inclusion in a rock or mineral collection.

Also known as "potters ore", galena is used in a green glaze applied to pottery.

Galena Specifications:

Color: Lead gray and silvery
Color of streak: Lead gray
Moh’s hardness: 2.5 - 2.75
Specific gravity: 7.2 - 7.6
Cleavage: Cubic perfect on [001], parting on [111]
Fracture: Subconchoidal
Crystal system: Cubic
Chemical composition: PbS
Transparency: Opaque
Refractive index: None
Double refraction: None
Dispersion: None
Pleochroism: None
Absorption spectrum: None
Fluorescence: None

Please be aware that this is a natural mineral and as such each piece is one of a kind! The one you receive may not be exactly the same as the ones pictured but it will be similar. Price is per each piece. They come in irregular shapes, sizes and weights.