Embarrassing story for you Frank.
Many years back I was attending a graveside funeral service. I noticed rocks all over the headstone/marker and thought, " this place is a dump. They need to hire a grounds keeper that actually cares about his job. This poor man has been covered by all these pebbles." So I took it upon myself to clean the headstone.
Fast forward several years. I finally watched the movie " Shindlers List". Awesome movie! So at the end, all these Jews are placing rocks on the guys grave.
I immediately started researching and learned the meaning. I felt horrible at what I had done.
A good hunting buddy of mine past away about 4 years ago. Anytime I'm at our land, I place a rock in my pocket. When I'm in the area of his grave, I stop by and place that rock on his headstone. Neither one of us are/were Jewish but I love the meaning.
Hope it's acceptable for a Baptist to practice this.