Concrete cobble effect paving slab - grout options

[Simon1987]

Hi,

I have some cobble effect paving slabs which I would like to clean up and reuse. My question is what is the best grout to use to make them look like actual cobbles? Is there a grout which I could put inbetween the slabs but also inbetween each "cobble" to make them look more like individual stones? Currently looking at EASY Joint but not sure if I try and lay it inbetween each cobble stone it will just brush off over time.

Pictures here (hopefully) - https://www.google.com/search?q=cobbled ... prnaPCfVGM

Thanks in advance.