Have you virtually visited your relative’s memorials at FindAGrave?
Even if you have seen the stone yourself, there may be information there that you don’t have–perhaps links to burials of other family members or additional information on the Memorial Page.
If you have not seen the stone, FindAGrave can be a great place to get a digital image of that stone.
Just remember to double check “non-stone” information with other sources. Some submitters pay more attention to accuracy than others.
But it’s always great to get a picture of the stone.