In alchemy, the ideas of Aristotle were used by many later generations and civilisations and were included in early Islamic teachings
".......the Quintessence was often symbolized by the hexagram (``Solomon's Seal'') because it unites the signs of the elements....."
(SEE diagram of symbols below)
Quintessence:The pure, highly concentrated essence of a thing.
The purest or most typical instance: the quintessence of evil.
In ancient and medieval philosophy, the fifth and highest essence after the four elements of earth, air, fire, and water, thought to be the substance of the heavenly bodies and latent in all things.
Mystery solved
Regards David