Help to identify tile type

[Penguin33]

I have just moved in to a new house. These tiles are laid in both bathrooms. They are rough in texture (my socks kind of grip to them?!) and look very dusty. It doesn’t seem to matter what I clean them with they continue to look dusty!
Can anyone help me to identify what type of tile they are and offer advice on cleaning / sealing them to improve the look?
Thank you

 

[Flintstone]

They are Matt porcelain, penguin. Try Lithofin cleaning products !

 

[Penguin33]

Thank you ‘LocalTiler’

Can I seal them at all? They get water stain marks on really easily and are difficult to mop

 

[Qwerty]

@Lithofin BOB may be able to help you