Thank you. So, as basalt could be cut into slabs for flooring, it could obviously be cut into slabs for building house walls. I had been wondering if it was too hard a material to build a house out of, with doorways having to be carved out of it. I was thinking of a house built on a volcanic island (in ancient times). Would the basalt used for building be naturally shiny, do you think, or would it need polishing?