The first image to me looks somewhat like an igneous rock, based on the way it has been weathered and eroded (cracked). The second looks more like a breccia as I see angular to sub-angular clasts. In the third image I may be able to recognize a mudstone or sedimentary (low energetic depositional environment) rock with some calcite or quartz concretions in the veins (caused by stress)
It's difficult to tell from pictures though, but hope this helped...
