How well will modern grave stones hold up in the years to come?

Question:

How well will modern grave stones hold up in the years to come?

I visited the grave of my great-great grandparents, who both died in the late 1890s. Unfortunately, time has not been kind to their grave stone, which has pretty badly - most of the inscription on the stone has faded to the point that it's no longer readable.

I was wondering if modern day grave markers would fare any better, if they would still be readable a century after they were made and placed.

Best Answer - Chosen by Asker: they used to chizzle them now they use lazers and granite and marble and a protective with proof coating my grand parennts grave stones will be like they day they where when i took a shovel and started to burry them with my family at the funeral a tradition in our family i am positive when my time comes it will be as it was when i was 12.