NWA 13135 (appariée) - Uréilite - Individu complet - 13,59g - Maroc

This 13.7g slice of Missour 001 shows the coarse, dark interior typical of a Ureilite, with greenish-grey silicate grains set among darker, carbon-rich areas and a weathered brown rim around its irregular edge. It is presented in a display frame with an OuterSpacer Meteorites label.

Missour 001 is a Ureilite found in Morocco in 2021, with a total known weight of 876g. Ureilites are a distinctive group of primitive achondrites, made mostly of olivine and pyroxene, often pigeonite, with carbon in the form of graphite, and sometimes tiny diamonds, concentrated along the boundaries between the grains.

Scientists generally interpret Ureilites as fragments of the mantle of a single parent asteroid that was partly melted and then broken apart by a major impact early in the history of the Solar System. In 2008 the small asteroid 2008 TC3 was tracked in space before it struck Earth over Sudan, and the recovered Almahata Sitta stones, much of which is Ureilite material, gave researchers a rare direct link between this group and an asteroid observed before impact.

For collectors, Ureilites are an uncommon and scientifically important group, and a well cut slice like this one shows the coarse texture that sets them apart from other stony meteorites. Missour 001 offers a named, officially classified example with a modest total known weight.