Activity Angela B posted a new specimen in the group What is it? from the myFOSSIL app 1 year, 10 months ago 1 year, 10 months ago 1 year, 10 months ago Angela B has contributed specimen mFeM 82794 to myFOSSIL! Patrick Hsieh replied 1 year, 10 months 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.