Mineral wool and rock wool contain crystalline and amorphous metal oxides, which technically classifies them as containing ceramics. Their structure, resembling cotton candy, contributes to their excellent insulation properties due to the high air content. However, the presence of binders and oils complicates their classification, making them composite materials rather than pure ceramics. A purist perspective would reject labeling them as ceramics, but they predominantly consist of ceramic material. Thus, while not strictly ceramics, mineral and rock wools can be said to contain ceramic components.