III · Seven Planetary Metals

Silver (Argentum, Luna) is chymistry's white lunar metal, marked ☽, allied to albedo, and identical with Ag.

Gold (Sol), or Aurum, is the solar noble metal Au whose chymical glyph is the circled point and whose opus stage is Rubedo.

Copper, or Cuprum, is Venus's metal: the soft red conductor Cu, signed ♀, whose salts green the viriditas of the opus.

Iron (Mars), Latin Ferrum, is the martial metal of Renaissance chymistry, written ♂ and later identified as Fe.

Lead (Saturn), plumbum, is the heavy fusible metal whose glyph ♄ marks both common Pb and the black nigredo of the Magnum Opus.

Tin (Jupiter) is stannum (Sn), the soft planetary metal of Jupiter (♃), assigned in the Magnum Opus to the whitening work of Albedo.