The work of Bonet influenced the 15th century Burgundian heraldist Jean Courtois (d. 1436), also known as the Sicily Herald. In his work "Le Blason des Couleurs" (1414), Courtois developed a heraldic system consisting of the tinctures, planets and carbuncles, together with the virtues, metals, months, the zodiac, and weekdays. His main contribution was the development of a gemstone-planetary blazon that related color to gemstone to planet: "or", topaz, the sun; "argent", pearl, the moon; "gules", ruby, Mars; "sable", diamond, Saturn; "azure", sapphire, Jupiter; "vert", emerald, Venus; "purpure", amethyst, Mercury; "tenné", jacinth, dragon's head (ascending lunar node); "sanguine/murrey", sardonyx, dragon's tail (descending lunar node).