What type of foliated metamophic rock was once used as roofing matierial?

Hi I have posted a couple questions already. About 6 days ago my husband of almost 2 years told me he felt like he would be happier being single. Now we have been together for almost 10 years. We have no children. Honestly we have never been with anyone other than each other. We are both 25. I had...

Would iron-containing limestone make a good building stone for a monument?

How do you know if the person is worth waiting, when you know that on the other end... she has someone else too?