ACFER 404 (officially classified) CR2 Carbonaceous meteorite Found in February 2022 in Algeria. 7.68 grams a complete individual. This meteorite is rare and scientifically important Carbonaceous meteorite. GUARANTEED AUTHENTICITY, You are buying 100% guaranteed authentic meteorite combined with a signed certificate of authenticity. Free first class express delivery and tracking will be provided. Meteoritical Bulletin data source: Petrography: (A. Irving, UWS, J. Boesenberg, BrownU, and L. Garvie, ASU) Well-defined chondrules (apparent diameter 1420±800 µm, N = 27) containing devitrified glass are set in a fine grained matrix (~25 vol.%, deep reddish-brown in thin section) containing kamacite, taenite, high-Ca pyroxene, troilite, chromite and Fe-Mg-rich phyllosilicates (with low oxide sums of 83-86 wt.%). Metal is present within many chondrules and rimming some chondrules, and almost pure anorthite is present in some chondrules. Olivine compositions determined by EPMA are bimodal and comprise both magnesian (Type I) and more ferroan (Type II) varieties. Analysis of matrix material by powder X-ray diffraction confirmed the bimodal olivine compositions and identified phyllosilicates as a minor component. A few small, irregularly shaped, fine-grained CAI are present in the studied thin section. Geochemistry: Average of 12 random olivine analyses Fa18.3±17.4 (n=12). Type I (magnesian) olivine (Fa2.2±0.9, range Fa1.4-3.4, N = 6), Type II (ferroan) olivine (Fa31.8±6.1, range Fa24.2-43.0, N = 11), low-Ca pyroxene (Fs3.1±0.9Wo1.5±1.6, range Fs2.2-4.2Wo0.5-3.8, N = 4), augite (Fs2.8±0.4Wo41.4±1.7, range Fs2.5-3.3Wo40.3-43.4, N = 3), anorthite (An99.1Or0.1). Oxygen isotopes (K. Ziegler, UNM): analyses of acid-washed subsamples by laser fluorination gave, respectively, δ17O -2.100, -0.462, -1.921; δ18O 0.555, 2.559, 1.297; Δ17O -2.393, -1.813, -2.606 per mil (all data linearized, TFL slope = 0.528). Magnetic susceptibility log χ (× 10-9 m3/kg) = 5.35. Classification: Carbonaceous chondrite (CR2). The presence of phyllosilicates indicates a type 2 carbonaceous chondrite. The high magnetic susceptibility is characteristic of CR2 chondrites. The oxygen isotopic compositions plot on the established trend for Renazzo, Al Rais, and other CR chondrties.