This is another kind of quartzite, often called dolomitic marble. It has a surface that is hard and non-foliated, making it extremely durable. Non-foliated means it does not have a smooth, sheet-like surface covering it. It has a grainy texture.
It has a unique pattern of dark gray to black veins on a white or light gray base. The color and the pattern of this stone make any surface look modern and sophisticated. It is very commonly used in kitchen countertops, bathroom vanity surfaces, and bar tops.