My take on the weekly challenge.
7th iteration. Added cracks, rebalanced roughness.
6th iteration. Balanced masks some more, and separated roughness for the different stone types.
5th iteration. Added pebbles and added some more wear.
4th iteration. Updated the patterns and colours. Balanced the heightmap and added more masks for different tiles.
3rd iteration, put in some more pebble layers and changed the colours. Also added wear and grime.
2nd iteration. 1st was just a heightmap. Im happy with the overlapping in the pattern, but the colours and roughness are very WIP still.