What type of flooring (kind/decor) is this? Who can help?

Hello dear fellow campaigners,

we are proud, new homeowners of an existing property and would like to implement some projects in the near future. This also includes a partially uniform floor and the hallways.

Here we want to continue the existing floor.

What type / color is this?

Thank you very much for your help!
Regards Martin

That looks like granite. I would take the pictures to a natural stone dealer.

I also think polished granite. The stonemasons (tombstones and co) do that.