Quick rundown of features can be seen here: https://vimeo.com/205818199

Substance Designer parametric PBR materials, featuring 5 marble materials and one bonus granite since one marble texture is available for free (http://cbr.sh/vuvlv). All textures go up to 4k, are tileable and seamless, each material has it's set of customizations and all are randomizable for infinite variations.

Made using Substance Designer 5.6.1. If you just want separated channels (and don't own any Allegorithmics software) I recommend using Substance Player that is free.