true! The most notable thing about cave art is that the predominant colours used are black (often from charcoal, soot, or manganese oxide), yellow ochre (often from limonite), red ochre (haematite, or baked limonite), and white (kaolin clay, burnt shells, calcite, powdered gypsum, or powdered calcium carbonate).
Ochre, or ocher in American English, is a natural clay earth pigment which is a mixture of ferric oxide and varying amounts of clay and sand. It ranges in colour from yellow to deep orange or brown. It is also the name of the colours produced by this pigment, especially a light brownish-yellow
Manganese is used to make clear glass, to desulfurize and deoxidize steel in steel production and to reduce the octane rating in gasoline. It also is used as a black-brown pigment in paint and as filler in dry cell batteries. Its alloys help stiffen the aluminum in soft-drink cans, according to Chemicool.