Sure is. Would you consider starting an ‘Ask the…’ thread in the IMHO forum? I’d be interested to read and participate.
Interesting thing I noticed a week or two back. I was in the UK and was looking for the graves of Princhester ancestors. Working my way through the relevant graveyards I noticed that the very old headstones were often illegible because the engraving had flaked and pitted away, but usually only if it was on the northern side. Presumably because that was the damp side, where moss and lichen grew, eating away the stone. Engraving on the southern side that got the sun would often be totally legible, even if equally old and on the same type of stone.
Moral of the story: if you want your loved one’s headstone to be legible in 300 years, make sure the engraving faces the equator.
Possibly also frost spalling. West-facing surfaces are supposedly the most protected against that though (because they warm up in the evening and don’t get a shock change of temperature the following sunrise)
And make sure you’re not buried in Norway where 300 year old graves are rare, since cemetery space is expensive and reused for anyone not famous or having descendants paying the upkeep fee.
I remember my grandfather being quite irritated that when he purchased his headstone, he had his name and my grandmother’s engraved along with their date of birth, but the mason refused to put the “19” in the date of death. “I’ll never live to 2000, those damn fools” he’d say. Being born in 1903 and his wife in 1900, that was a pretty safe bet but they still wouldn’t carve the “19” in there. As it turned out, neither made it to 1990, but we never had to worry about Y2K headstone issues.