pallasite

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Noun1.pallasite - a meteorite composed principally of olivine and metallic ironpallasite - a meteorite composed principally of olivine and metallic iron
meteorite - stony or metallic object that is the remains of a meteoroid that has reached the earth's surface
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Scientists have long thought that pallasites were formed along the boundary between a planetary body's metal core and rocky mantle, where olivine, nickel and iron could come together.
Of the more than 40,000 meteorites recognized in the world, only 84 are classed as pallasites.
The most unusual peridot comes from meteorites (space rocks that hit Earth) called pallasites.