Processed slabs, and systems and methods related thereto

A processed slab formed from a plurality of particulate mineral mixes deposited into a mold, comprising:

• a slab width that is at least 2 feet, a slab length that extends perpendicular to the slab width and that is at least 6 feet, and a slab thickness that extends perpendicular to the slab width and the slab length, the slab length greater than the slab width, the slab width greater than the slab thickness;
• a first predetermined pattern defined by a first particulate mineral mix and comprising a set of slab veins exposed along a major surface of the slab, the set of slab veins comprising:
• a first vein in a generally lengthwise direction along the major surface, the first vein having a first vein thickness defined by the first particulate mineral mix that is equal and parallel to the slab thickness,
• a second vein in a generally widthwise direction along the major surface, the second vein having a second vein thickness defined by the first particulate mineral mix that is equal and parallel to the slab thickness,
• wherein the first vein in the generally lengthwise direction intersects the second vein in the generally widthwise direction;
• and
• a second predetermined pattern defined by a second particulate mineral mix that occupies the entire slab thickness;
• wherein the first and second mineral mixes are different and each comprise quartz and one or more binders, the first particulate mineral mix absent from the second predetermined pattern and the second particulate mineral mix absent from the first predetermined pattern.