Transmitted Light It is possible to observe the chondritic texture, as well as the dark vein that indicates a high shock stage to the Paranaíba meteorite. Image Credit: Amanda Tosi

Transmitted and Polarized Light Image Credit: Amanda Tosi

Fragment of the Paranaíba meteorite showing the dark vein formed by a strong shock event, which melted some minerals present in the region. Image Credit: André Moutinho

Transmitted and Polarized Light Image Credit: M. E. Zucolotto

Transmitted Light Image Credit: M. E. Zucolotto

Porangaba meteorite fragment showing its defined chondritic texture and the fusion crust on the surface. Image Credit: André Moutinho

Fragment of the Rio Negro meteorite with its chondritic texture and fusion crust. Image Credit: André Moutinho

Zeiss Axio Imager Optical Microscope - CITL MK5-2 Cathode Ray Source 15KeV - 0.7mA The predominance of the blue color indicates that the meteorite suffered a thermal metamorphism, not being so primitive within the Ordinary Chondrites. Image Credit: Amanda Tosi

Transmitted and Polarized It is possible to observe some chondrules, as well as the shock vein with molten material, indicating a moderate to strong shock stage. Image Credit: M. E. Zucolotto

Fragment of the Parauapebas meteorite showing the chondritic texture and fusion crust. Image Credit: André Moutinho

Fragment of the Putinga meteorite with its fusion crust and the grooves on its surface, called regmaglites, characteristic of meteoritic rocks. Image Credit: André Moutinho

Fragment of the Putinga meteorite with its exposed internal texture, where it is possible to observe the almost imperceptible chondritic texture, typical of type 6, and the terrestrial weathering that oxidized the FeNi metals present. Image Credit: André Moutinho

Fragment of the Santa Bárbara meteorite showing its fusion crust and chondritic internal texture, typical of an Ordinary Chondrite L4. Image Credit: André Moutinho

Transmitted and Polarized Light Image Credit: Amanda Tosi

Transmitted Light Image Credit: Amanda Tosi

Fragment of the Patrimônio meteorite exhibiting chondritic texture with some oxidation spots and fusion crust. Image Credit: André Moutinho

Fragment of the Rio do Pires meteorite exhibiting a slightly chondritic texture, due to the thermal and typical metamorphism of type 6, the terrestrial weathering in the oxidation exposed around the metals, as well as the fusion crust on the surface. Image Credit: André Moutinho

Backscattered electron image (compo) 15KeV - 20nA EDS analysis in the vein detected kamacite metals, albitic glass and olivines. Image Credits: Amanda Tosi

Backscattered electron image (compo) 15KeV - 20nA By EDS analysis, kamacites and troilites (002 and 004) were detected. It is also possible to notice the lack of defined chondrules. Image Credit: Amanda Tosi

Troilite (FeS) on the left, kamacite (FeNi ~5% Ni) on the right and tetrataenite (FeNi ~50% Ni) below. Source: TOSI A. A.

Zoned Taenite in the center and cloundy taenite on the left. Source: TOSI A.A.

Plagioclase grain (dark gray in the center) recrystallized from the vitreous matrix. Source: TOSI A.A.