Twannberg IIG Iron Meteorite Bern, Switzerland - Individual - 4.45g

This is a pretty cool piece that a lot of serious collectors try to obtain.  Twannberg is a Switzerland find.  So far, only 8 meteorites have been found in Switzerland.  The Twannberg meteorite is the only hexahedrite.  Worldwide, only six hexahedrite IIG meteorites have been found which makes this one rare.  Hexahedrites are a structural class of iron meteorite. They are composed almost exclusively of the nickel–iron alloy kamacite and are lower in nickel content than the octahedrites. The nickel concentration in hexahedrites is always below 5.8% and only rarely below 5.3%.  

Twannberg was first discovered May 9, 1984, in a barley field while it was being ploughed (Twannberg I).  The meteorite is named after Twannberg, a mountain that lies north of Twann.  The first fragment found weighed 15.91 kilograms.  Two additional fragments were found in an unnatural setting. One fragment (II) was found in 2000 in an attic in Twann and another (III) in 2005 in the Naturhistorisches Museum Bern, in a collection received from the Museum Schwab in Biel where it had been labeled as hematite around 1930. Twannberg IV, V and VI were found in the creek Twannbach.  The find location is a glacial till deposit. This paired with minerals found in the oxidized surface of the meteorite are an indicator that the meteorite fell on the Rhone glacier and was transported by it to Twann during the Würm ice age and then deposited there.  This meteorite fell about 200,000+ years ago and despite its age, is still in very good condition! 

The weight of this piece is 4.45 grams.

All of my meteorites come with a COA.