I designed the main parts and small details in Gaea and transferred them as a height map to Substance Designer. I added details like noise and grunge maps to make the stone texture more prominent. Then I added the base color and roughness as the physical properties suitable for the material. In the final stage, I added omni light in Marmoset Toolbag to achieve the desired quality with ACES. Finally, I adjusted the contrast in post-processing and got the render output.