Here is a classic trilobite from the Czech Republic of the species Aulacopleura konincki in a very nice preservation. The trilobite itself measures about 8 mm in length. This piece comes with the positive and negative side.
This is a beautiful and interesting Chalcedony snail of the species Hippochrenes volgensis from the Paleocene of the Saratov region (Russia). In fact, all fossil snails from this site are often identified as this species.