When Steel wool was added to a blue colored CuCl2 solution, the color of solution gradually changed from blue to yellow. At the same time, there are some red solid covering the steel wool. What is the identity of the red solid on steel wool?

Pegmatites are igneous rocks in which the individual minerals are very large. typically, the minerals are all light-colored quartz, feldspar and muscovite. if you were given a black and white photograph of a pegmatite in a quarry (where the rock has been blasted and broken), what physical properties could you use to identify those three minerals in this hypothetical photo? describe each mineral and the specific diagnostic properties. be specific.