93. Corallus rubius: .i. red coral i.e. a stone that is cold and dry in the second degree; the redder it is, the more superior it is; there are two sorts of it, a white sort and a red sort; the heavier and the more brilliant it is, the more superior it is; it retains its efficacy for only 40 years; it has the virtue of stopping a flow of blood, and it has the comforting virtue; it serves well against epilepsy. Dioscorides says that whoever is carrying it, thunder or lightning do not harm him, and, whatever ship he may be in, storms will not do any harm to it; it is good against bad dreams; the devils of the air do not harm the person who has it, and whoever carries it always is not drowned. It is the red coral which the man should have at his throat, and the white coral which the woman should carry at her breast; the powder of coral is good against illnesses of the respiratory organs, such as empyema, and other similar illnesses that are accompanied by bleeding.