Activity Angela B posted a new specimen in the group What is it? from the myFOSSIL app 2 years ago 2 years ago 2 years ago Angela B has contributed specimen mFeM 82794 to myFOSSIL! Patrick Hsieh replied 2 years ago Looks like a worm shell (family Vermetidae) that had cemented itself to a beach rock. I don’t see any mineralization, for example the inside of the shell is nice and shiny and the shell looks white and porous. It is therefore probably not a fossil.