Under optical microscope, two thin sections were analyzed and showed Ubá as an unbrecciated ordinary chondrite containing a light mm-sized clast set within brownish-gray host with generally readily discernible equilibrated chondrules. Composed predominantly of orthopyroxene, olivine, FeNi metal (kamacite), troilite and interstitial albitic feldspar (<50 µm). Minor Ca-rich pyroxene (pigeonite and augite), taenite, and tetrataenite phases occur. Dark and light regions were observed with the same petrologic texture exhibiting a low shock stage S1 to S2 due to the presence of sharp and undulatory extinction of olivine and presence of Newman lines in kamacite. Troilite is essentially unaltered and most metal is fresh with few oxidized grains (W1).