TOP GALENA SPHALERITE
A Top Galena Sphalerite specimen to add to your collection. This is a top specimen of metal crystals. An outstanding specimen with lustrous, well formed crystals of Galena. Many terminated crystals clustered together with quartz crystals and some minor chalcopyrite. This specimen is from the premier location for this mineral. A super piece, my photos don’t do it justice. The Octocube Galena crystals show great reflection indicating very high Silver content.
Borieva Mine, Madan, Bulgaria.
10.1cm x 6.8cm x 3.3cm, 258g
Sphalerite, also known as Blende or Zinc Blende, is the major ore of zinc. When pure (with little or no iron) it forms clear crystals with colours ranging from pale yellow (known as Cleophane) to orange and red shades (known as Ruby Blende), but as iron content increases it forms dark, opaque metallic crystals (known as Marmatite).
Quartz is the most common mineral found on the surface of the Earth. A significant component of many igneous, metamorphic and sedimentary rocks. This natural form of silicon dioxide is found in an impressive range of varieties and colours. There are many names for different varieties.
Galena: PbS or (Pb,Ag,As,Sb,Cu)S
Galena is the primary ore mineral of lead. Worked for its lead content as early as 3000 BC, it is found in ore veins with sphalerite, pyrite, chalcopyrite, tennantite-tetrahedrite, etc. and in skarns, as well as in sedimentary rocks where it may replace carbonate beds or be deposited in pore spaces. The crystals are bright when fresh but often tarnish after exposure to air and especially when people touch it. Lead sulfide may contain impurities, such as silver, arsenic, antimony, and copper.