Meteorite slice 5 x1 1/4 x 1/8th inches. This is off the seymchan meteorite that fell in Siberia in 1967 and is authenticated with IMCA code 2232.Natural not worked has the shape of knife blade. Nickel steel, good patterns. Crystal structure is formed cooling one degree per million yers. This is older than the earth. This is one of the meteorites traditionally used in the making of high end knives, one of the sought after hard to get types. Extremely dene metal from high impact hitting earth.