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It could be anything - artifical stone, marble, or laminate/veneer of some sort. I am Voting to Close, as asking for opinions. It is unlikely to be marble. Why not ask the blog poster ?
The actual material is unknown from a picture, but the material it may be, or may be "faking" in various other materials at various levels of faithfulness is pretty unabiguous and non-opinion based, @RohitGupta
Post a comment on the blog - ask them. Take the pics to your local custom cabinet/counter place and ask them. Oh, and to answer your only asked question, No, I don't have a clue what it is.