Where do Interstone granite and marble slabs originate from? By Netto Q & AApril 7, 20150 Back to Home Hi there, I'm wondering where Interstone acquires their exotic granite slabs and marbles? Thank you. Answers By Interstone Marble and Granite LimitedApril 7, 2015 11:16 AM Our slabs come from all over the world. Many stones are from Brazil, India, Norway, Africa, Angola, Italy, and we also have some Canadian stones. We bring the world to your home. Back to Home