Hi libby landy,
Beautiful isn't it?
It's Cornish granite - part of the original structure.

Hi bjsgoodlivin,
Thank you!
Where are you based? If you're in Cornwall come and visit our studio and showroom - we'd love to talk more about your project! If you're based outside of Cornwall, drop us an email or call to give us more of a description about what you're after and we can see what we can do for you.