https://gamesartist.co.uk/emerald-tiles/
Material Artist Max Eno breaks down the creation of a procedural space-green tile material. In this article, Max discusses references, tile creation, crack generation, mortar, fragment distribution, blending, color, roughness and final presentation in Unreal Engine.
https://www.artstation.com/max_eno
https://www.artstation.com/artwork/3EJlqg