found a small pearl...
by Tomislav Vladusic
Last Sunday we went to the river for a walk and decided to take some mussel and clam shells. While cleaning the mud off a mussel shell, I noticed a small pearl attached. There's a groove around it, so it seems like it's grown into the shell. Not entirely sure about the species, but I believe it's Sinanodonta woodiana. Location - Sava river, Jasenovac, Croatia. The pearl is 3 mm wide.