Synthetic molded slabs, and systems and methods related thereto

A set of separately processed slabs, each respective slab of the set comprising at least two different particulate mineral mixes distributed in a series of successive layers according to a predefined pattern for all of the separately processed slabs, the two different particulate mineral mixes each comprising a quartz material, one or more pigments, and one or more resin binders, wherein each respective slab has a major surface at least 2 feet wide by at least 6 feet long and extending perpendicularly to a slab thickness, the major surface having a first substantially bowed pigmented vein that extends generally lengthwise from edge-to-edge, wherein the first substantially bowed pigmented vein has a vein thickness equal to and parallel to the slab thickness, wherein the slab comprises at least two different particulate mineral mixes distributed in the series of successive layers according to the predefined pattern, a first of the two different particulate mineral mixes defining the first substantially bowed pigmented vein, wherein the first particulate mineral mix occupies the entire slab thickness at a first region that defines the first substantially bowed pigmented vein and a second of the two different particulate mineral mixes occupies the entire slab thickness at a second region, the first particulate mineral mix being absent from the second region and the second particulate mineral mix being absent from the first region;

• and wherein the major surface of each respective slab in the set has similarly positioned and colored substantially bowed pigmented veins.