The dimensions of the Itapuranga meteorite are 75x65x43 cm, in approximately orthogonal directions, and the mass is 628 kilos. The regmagliptic grooves are well evident, with the intensity of the recesses and the irregularity in the distribution of the concavities appearing as the most notable character. Mineralogically, kamacite and taenite, occurring irregularly interpenetrated, in a mosaic texture, are the main constituents. Its internal structure was identified by attacking a 45x30 mm fragment, immersed in 20% nitric acid alcoholic solution. After 15 minutes of attack, the structure formed by centimetric crystals of kamacite, with a very pale grayish color and very bright, interspersed with darker and more attacked crystals, characterizing Taenite, was immediately highlighted. The crystals are irregularly interpenetrated in a mosaic texture. Another mineral identified was schreibersite, which also occurs in the form of rhabdite. They are relatively common, recognizable by their light tan color, appearing in the form of small submillary lenses or irregular venules 0, I to 0.2 mm wide by 8 to 10 mm long. Other times, they are equidimensional and irregularly shaped, about 0.2 to 0.3 mm in size. Note also the presence of lines forming variable angles, from 30 to 40 °, corresponding sometimes to the Neumann lines, in the areas where kamacite predominates, sometimes to those of Widmanstãtten, where the nickel content is higher. From a structural point of view, siderite is a typical coarse octahedrite (width of the kamacite lamellae, 1.5 mm). Source: Svisero et al. (1980).