Morcant-BG modern vanity combo sink is made of polished cream onyx stone. This cream onyx vanity sink is essentially hand carved. However, the help of some modern tools like small diamond saws and handheld polishing tools have been employed. Because it is hand carved, you can expect small variations in the size and shape of the Morcant-BG sink. Generally, a size allowance of a quarter of an -Inch to an -Inch is given.