Northwest Africa 11921 (NWA 11921) (Northwest Africa) Purchased: 2018 Classification: Martian meteorite (polymict breccia) History: Reportedly recovered in 2017 at the find site of NWA 7034 and purchased by Said Yousfi in 2018 from a local meteorite dealer in Zagora, Morocco. Physical characteristics: Six black fragments with shiny crust. Petrography: The meteorite is a polymict breccia composed of lithic and mineral clasts set into a very fine-grained clastic matrix. Lithic clasts include basaltic and impact melt types; most abundant mineral phases in clasts and matrix are pyroxene and feldspar, both of highly variable composition. Minor phases are ilmenite, magnetite, Ti,Cr-magnetite, and Cl-apatite. The meteorite’s high magnetic susceptibility reflects the high content of Fe-oxides and is in good agreement with data in Gattacceca et al. 2014. Geochemistry: low-Ca pyroxene: Fs25.1±5.5Wo3.6±1.1 (Fs19.5-33.5Wo2.0-5.0, n=15, FeO/MnO=30-38); pigeonite: Fs39.9±12.0Wo8.0±2.7 (Fs25.6-52.3Wo5.6-12.4, n=10, FeO/MnO=30-40); Ca-pyroxene: Fs25.8±10.2Wo36.7±6.5 (Fs17.4-44.3Wo26.1-43.3, n=15, FeO/MnO=26-41); feldspar: An40.4±9.2Ab56.5±8.2Or3.1±1.9 (An29.0-49.3Ab48.3-66.7Or2.0-4.4, n=13) Classification: Martian meteorite (polymict breccia). Likely paired with NWA 7034 and respective clan members. As members of the IMCA (International Association of Meteorite Collectors), we guarantee the authenticity of all our pieces. (The certificate of authenticity will be delivered with the Meteorite)