1. Palasite Main Group - NWA 17921 (weight 1.27 grams) Classification: Pallasite (Main group) Physical characteristics: Weathered exterior with yellow crystals on the exterior of some samples. The interior show weathered minerals set in a altered metal matrix. Petrography: (Jose Garcia, ADARA) The sample is dominated by rounded to subrounded olivine crystals, surrounded and permeated by a network of metal completely altered to FeOH. Sulfide are also observed. Geochemistry: Olivine Fa13.0±0.3, FeO/MnO 36±4 (n=7). Classification: Pallasite (main group) 2. Carbonaceous CK3 - NWA 14596 (weight 1.13 grams) Physical characteristics: Small, flat specimen displaying 60% fusion crust cover, with one weathered, broken surface around much of the edge between fusion crust surfaces. CAIs are visible through fusion crust. Desert polish is moderately developed. Magnetic susceptibilty on a 9.82 g fragment is log χ (× 10-9 m3/kg) = 4.71. Petrography: Cut surfaces show a gray matrix bearing large chondrules and some CAIs. In thin section, chondrules (15 vol%), calcium aluminum-rich inclusions (15 vol%) and amoeboid olivine aggregates (5 vol%) all bear dark fine-grained rims, well spaced in a dark fragmental matrix. Chondrules of dominantly POP, BO types average 910±424 µm (n=24) diameter, and typically have igneous rims. Several round dark inclusions ranging from 150 to 800 µm are also present, bearing fine magnetite-rich rims. Olivine in chondrules and martix shows sharp to undulatory extinction. Olivine in the matrix appears pitted with cloudy cores. No metal is present. Spongy textured magnetite occurs as small grains, isolated spherical aggregates in matrix and as grains in rim material and inclusions within chondrules. Troilite appears on some chondrule rims and as blocky isolated grains in the matrix. In BSE images, chondrule olivine grains are typically zoned to Fe-rich rims. Geochemistry: EPMA: Olivine Fa20.76±11.91 (n=32); Chondrule olivine Fa17.95±12.06 (n=25); Matrix olivine Fa30.81±0.36 (n=7). Ca-poor pyroxene: Fs6.95±8.79En92.07±8.55Wo0.98±0.38 (n=14); Ca-rich pyroxene: Fs5.76±4.52En50.95±11.57Wo43.30±7.19 (n=15). Magnetite compositions: Cr2O3=2.50±0.22, TiO2=0.60±0.11, NiO=0.35±0.04, Al2O3=2.56±0.21 (n=20). Classification: CK3 (S2) Moderately Weathered. Chondrule olivine variability and matrix olivine equilibration as well as magnetite compositions all fit criteria of CK. Cr2O3 content between 2 and 3 wt% indicates CK3. 3. Diogenite polymict breccia - NWA 15788 (weight 8.61 grams) Petrography: (A. Irving, UWS, and P. Carpenter, WUSL) Breccia composed predominantly crystalline debris derived from diogenites (zoned low-Ca pyroxene, anorthite and Ti-free chromite) with vol.% of eucritic material (as grains of exsolved pigeonite, labradorite, ilmenite and symplectitic intergrowths composed of silica polymorph+fayalite+hedenbergite). Minor kamacite and secondary Fe oxide are also present. Geochemistry: Orthopyroxene cores (Fs23.2-26.5Wo1.8, FeO/MnO = 31-34, N = 2), pigeonite rims (Fs33.6-34.8Wo8.2-6.8, FeO/MnO = 28-30, N = 2), ferroan pigeonite rim (Fs53.3Wo15.7, FeO/MnO = 35), subcalcic augite (Fs44.0Wo25.5, FeO/MnO = 31), low-Ca pyroxene hosts (Fs55.3-63.4Wo3.9-5.2; Fs39.0Wo5.1; FeO/MnO = 30-34, N = 3), augite exsolution lamellae (Fs28.8-28.9Wo40.5-41.6; Fs19.3Wo41.3; FeO/MnO = 29-33, N = 3), hedenbergite (Fs58.7Wo33.1, FeO/MnO = 42), fayalite (Fs82.7, FeO/MnO = 43), labradorite (An65.0-69.9Or1.4-1.7, N = 2), anorthite (An93.6-94.6Or0.2, N = 2). Classification: Diogenite (polymict breccia). 4. NWA Unclassified - likely LL3 type (weight 26.30 grams) This is an unclassified NWA Ordinary Chondrite, which most likely falls in the LL-chemical class, with a probabble petographic 4 or above, judging by its matrix characteristics, iron-nickel inclusions and chondrule definition. I am a member of the Meteoritical Society #7743 and have been collecting meteorites since 2010.