Colours are either[1] sombre or florid, these qualities arising either from the nature of the substances or their mode of combination. The florid colours are those which the employer supplies[2] to the painter at his own expense; minium,[3] namely, armenium, cinnabaris,[4] chrysocolla,[5] indicum, and purpurissum. The others are the sombre colours. Taking both kinds together, some are native colours, and others are artificial. Sinopis, rubrica, parætonium, melinum, cretria and orpiment, are native colours. The others are artificial, more particularly those described by us when speaking of metals; in addition to which there are, among the more common colours, ochra, usta or burnt ceruse, sandarach, sandyx, syricum, and atramentum.