Pallasite – PMGMagadanskaya District, Siberia, RussiaOriginally, Seymchan was identified as an iron-nickel meteorite, but when olivine crystals were found in parts of some of the Seymchan meteorites, it was identified as a far more rare pallasite. Pallasites are literally gemstones from outer space containing olivine crystals dispersed within the iron-nickel matrix.The present large slice etched and polished on both sides to reveal the beautiful scattering of olivine crystals and pattern of crystallization, with complete fusion crust on all edges. Widmanstätten pattern found in Seymchan, also seen are some olivine. Widmanstätten patterns are unique to iron-nickel meteorites and are not found on any rocks on Earth. The parent asteroid must have been relatively small, with a specific pressure and temperature range in the iron core, but also large enough to allow a slow cooling rate in the core of only a few degrees per million years. Widmanstätten patterns are created by the separation of two alloys of nickel: kamacite (which is low in nickel) and taenite (with a high nickel content.) The resulting crystalline structure of intersecting bands can be used to identify the meteorite; the smaller bands contain a higher nickel content. Weighing approximately 462 grams (1.01 lbs) and measuring 8 x 4 in