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Cinnabar (mercury sulphide - HgS) is the single most toxic mineral to handle on earth. It is the worldâs main source of mercury and has been mined since Neolithic times. However, when oxidized, this element will produce methyl mercury and dimethyl mercury, two toxic compounds that cause irreparable harm to the nervous systems of children. It is deadly in small concentrations and can be absorbed through the respiratory tract, intestines, or skin.
While the majority of acrylic based paints are not toxic, they are also generally not desirable to ingest either. There are some acrylic based paints which are extremely toxic; Cadmiums. Cadmium is a heavy metal used in a powdered form to make bright yellows and yellow reds.