6 x Ammonite shells in Matt Black Sliperit (17x13mm)

This is a pack of 6 Ammonite shell beads in Matt Black Sliperit. They are about 17mm by 13mm, 5mm thick with one hole which runs from one side of the shell to the other (not top to bottom). The beads were made in the Czech Republic and the Czech number for this colour is 23980/29503/84100.