Wishstone almost certainly igneous
The matrix part has not gotten much attention, but I see small radiating crystals there. Perhaps these are the tabular crystals someone mentioned, but in two dimensions it is hard to tell if they are tabular or acicular. The tight radiation suggests that they are acidular. Such delicate crystals would not be preserved in a sediment. Clusters of needles would have a difficult go of it trying to form after the rocks formation - unless it was remelted. I vote for the K-feldspar orthoclaseas the potassium mineral. Some very similar rhombic forms like this are seen in the Wishstone micro.