4" Lustrous Hedenbergite Crystal Cluster - Sweden

Hedenbergite is a calcium iron (magnesium) silicate that often bears a range of green to brown coloration. The crystals are typically opaque and occur in stubby or prismatic aggregates. Inner Mongolia, Russia, and Greece all produce quartz crystals colored green by fibrous hedenbergite inclusions. A variety of hedenbergite can be found in Sweden as well: green-black, blocky crystals come from the Nordmark Odal Field in Värmland County.

Hedenbergite was given its name in 1819 by Jöns Jakob Berzelius, a Swedish chemist. He named the mineral in honor of Anders Ludvig Hedenberg, a chemistry student and co-worker who originally discovered and described the mineral in Tunaberg, Sweden.

The general chemical formula of Hedenbergite is CaFe2+Si2O6 .