Recycling a headstone

Hi,

[One may not benefit from a grave and its attachments; therefore, one may not benefit from a headstone.]

When replacing an old headstone with a new one, one may use the old stone for the grave of a needy person; this is not considered inappropriate benefit from the headstone. However, the people involved should take care not to benefit from this stone, such as if the person carving the letters would charge for the stone itself.

(Rav Moshe Feinstein, Igrot Moshe Yoreh Deah 1:228)

Have a good day,
Mordechai