GALENA SPHALERITE CHALCOPYRITE
A large specimen with outstanding crystal formations of Galena Sphalerite Chalcopyrite, Pyrite and Quartz. This is a spectacular museum quality specimen displaying stunning crystals. A very collectable metal specimen with well formed crystal structures of several types. Featuring geometric crystal Galena forms, roses of Sphalerite crystals, brightly coloured crystals of Chalcopyrite and little clusters of striated Pyrite cubes. Not to mention the Quartz crystals. There are some minor dings on a few quartz crystals, but not enough to detract from the rarity and quality of the specimen, which stands upright. This is the best Galena Sphalerite Chalcopyrite specimen we have sold online. A truly one of a kind piece for the mineral collector. Grace your collection with this great natural treasure. A top shelf specimen from the private collection.
Borieva Mine, Madan, Bulgaria.
20.5cm x 18.5cm x 12cm, 3813g.
Galena: PbS or (Pb,Ag,As,Sb,Cu)S.
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.
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).
A major ore of copper. Common in sulfide veins and disseminated in igneous rocks.
Weathering may lead to the formation of malachite, azurite, brochantite, langite and numerous other secondary copper minerals.
Pyrite is the classic “Fool’s Gold”. There are other shiny brassy yellow minerals, but pyrite is by far the most common and the most often mistaken for gold.
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.