On Friday, 16 August 2019 12:22:35 UTC+1, The Natural Philosopher wrote:

Granite should not absorb anything.

Indeed. However, many "granite" worktops are not made of granite
but some other rock which often is absorbent.

Then it isnt granite is it?

That doesn't stop the people who sell such worktops calling it
granite, nor does it stop people who own them thinking it is
granite and then complaining about it getting stained.

John