Magnum opus
Main article:Â Magnum opus (alchemy)
The Great Work of Alchemy is often described as a series of four stages represented by colors.
- nigredo, a blackening or melanosis
- albedo, a whitening or leucosis
- citrinitas, a yellowing or xanthosis
- rubedo, a reddening, purpling, or iosis[120]
Philosopher’s stone
From Wikipedia, the free encyclopedia
 The philosophers’ stone or stone of the philosophers (Latin: lapis philosophorum) is a legendary alchemical substance said to be capable of turning base metals such as lead into gold (chrysopoeia) or silver. It was also sometimes believed to be an elixir of life, useful for rejuvenation and possibly for achieving immortality. For many centuries, it was the most sought-after goal in alchemy. The philosophers’ stone was the central symbol of the mystical terminology of alchemy, symbolizing perfection at its finest, enlightenment, and heavenly bliss. Efforts to discover the philosophers’ stone were known as the Magnum Opus (“Great Work”).[1]