Industrial Material Use.
What the materials used to construct modern vanities is, indeed, important to highlight. Usually, someone can instantly identify if some vanity brings some modern nuance in the room only because of looking that it is made of dominantly some kind of industrial materials.
The second most typical pattern or feature is the seamless design of each of such vanity. Hence, it is hardly possible to find vanities that are called modern but clearly characterized by many obvious marks of the joints between the elements. The designers understand that it is necessary to hide any seams that will degrade the beauty of the furniture.
The first pattern is that such vanities are geometrically shaped. They can be manifested in foursquare sides, rectangular tops, cubical vanity shapes, and so forth.