Is that a Morso? If so, I have that stove and it's absolutely amazing!! I have a slate hearth with it. It's super heavy so check that tiles to go underneath it will be ok with the weight!
You're right about granite! Maybe you can check where it is from in terms of the quarry etc?
Dust- hoooooray! I'm so glad you got to cook, huge symbolic moment. I am braced for a visit from the awful electrician, but hopefully might have mine on by the end of the day!!
Tika - hope the hole isn't too chilly! Definitely get them to keep filling it,we had a week with massive chasms in the walls and I wish I had just told them to fill them! Hoping your rats don't like building sites!!