A stunning large solid Galena Cluster with some Sphalerite Crystals. This is a chunky piece showing excellent crystals of galena. The sphalerite also exhibits the perfect crystal shape. Some quartz also appears in the piece. This is a super example of metal crystals that will grace any collection. A beaut specimen.
Borieva Mine, Madan, Bulgaria
10cm x 9cm x 7cm, 1366g
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.
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 Cleiophane) to orange and red shades (known as Ruby Blende), but as iron content increases it forms dark, opaque metallic crystals (known as Marmatite).