This is a African Black granite worktop with various scratches left where a bucket full of water was dragged off it trapping grit underneath...
Review
“I wanted to thank you for the outstanding work done for the kitchen top yesterday. I rally feared this won’t come up nicely as the kitchen fitters said it is not likely to achieve the same finish and they would not do it nor know anyone who can. I am absolutely delighted to have my kitchen worktop restored to its original condition.”