Slate stick mosaic (BL30 and BL46) or quartz stick mosaic (BL10). Antique finishing, 9-10mm thickness, on mesh. Ok wall. Belluno grey could have invisible iron oxide traces inside that, with water, could leak a little bit of rust. This does not affect product quality. Moreover it’s natural to meet sometime some “chipping” of stone on the surface due to the sedimentary origin of the product, but being BELLUNO a full body stone item the look is, in this case, always the same with no problem.