Alchemical Symbolism in the VMS

[MarcoP]

I understand the three faces (and plausibly the 3 colors in the T-O diagram) stand for:

Earth,Terra / Mercury (child?)
Fire / Sun (Pater/father)
Water / Moon (Mater / mother)

Elixir philosophorum componitur ex tribus, i.e. ex lapidi Lunari, Solari et Mercuriali. In Lunari existit sulphur album, in Solari sulfur rubeum, et Lapis Mercurialis amplectitur utramque naturam, albam et rubeam, et hec est fortitudo totius magisterii. 

"The Elixir of the Philosophers is composed of three [things], namely, the Lunar, Solar, and Mercurial Stones. In the Lunar [Stone] there is white sulphur; in the Solar [Stone], red sulphur; and the Mercurial Stone embraces both natures, white and red. And this is the strength of the entire Work."

In the Wellcome ms there's a typo: the Sun is mis-labelled "Mater", but it was Pater in the earlier Ashburnham 1166 ms.