This black marble fireplace with white veins has straight lines and high polishment. This black marble hearth has a square opening for putting the inbox, which suitable any size inbox, because we can make this mantel as your required inbox dimension. It was carved by machines, so the lines is straight and even on the surface. Our factory has lots of other hand and machine carved marble fireplace surround to waiting your choice. Of course, if you have own design, please let me know and we can also make for you.