Morasko, an Iron IAB-MG meteorite from Poland. First found in 1914, but new pieces have been continuously found over the years.
This 6 gr slice is polished and etched to show the different domains of irons. Different domains reflect the light at different angles, leading to different patterns, as can be seen in the pictures.
Supplied with a display box (see photo) and a Certificate of Authenticity (COA).