Online Encyclopedia of Western Signs and Ideograms Symbols.com

Symbol 17:13

1718

17:13 · A sign sometimes used by alchemists to represent a compound of lead and sulphur, lead sulphate. This sign is a combination of 1711 for lead, and an extra cross from the sulphur sign 3903 (which is also a sign for the asteroid Pallas).
    1718 is sometimes used to represent lead foil.