Grey tiles (Bramley LS13)

Loads of small, square, grey, stone tiles, reclaimed from our kitchen wall. Roughly 1-1.5m2 in total. The squares measure 4.6cm by 4.6cm each, and have a varied amount of grout and adhesive still attached. Could be good for a garden project, perhaps? Would love it if someone could reuse them instead of taking them straight to the tip!