What is "mineral orange"

minium \min"i*um\ (?; 277), n. [L. minium, an Iberian word, the Romans getting all their cinnabar from Spain; cf. Basque armine['a].] (Chem.) A heavy, brilliant red pigment, consisting of an oxide of lead, Pb3O4, obtained by exposing lead or massicot to a gentle and continued heat in the air. It is used as a cement, as a paint, and in the manufacture of flint glass. Called also red lead, lead tetroxide, lead orthoplumbate, mineral orange, mineral red, Paris red, Saturn red, and less definitively, lead oxide.