On July 4, 2021 I stumbled by this double yellow shell heart memorial at Surf Drive Beach.  I think (zoomed in on pic) the note on middle stone states “I never got to say goodbye.  Wish I could go back to the day when angels came and took you away.  I wanted to hold your hand so tight, kiss you gently and say goodnight and just before you had to go, I would tell you how much I love you”.  It appears that there was a pail of shells and a marker and others added names and notes on the shells of their loved ones who had also passed.