espanyol
símbolo alquímico 
Symbols that were used in alchemical literature to denote some elements and some compounds until the 18th century.
1
And suddenly the witches' mark had become a harmless alchemical symbol.
2
But when looked at from above it turned into a quite harmless alchemical symbol...
3
It was painted with rings of what were most likely alchemical symbols of some sort.
4
Orphic Egg: Alchemical symbol showing an egg (sometimes winged) entwined with a serpent.
5
Before his mind's eye he could see all those alchemical symbols that he had gotten to know at the university.
6
The alchemical symbols for salt, mercury, and sulfur were nestled in the triple lobes that decorated the end of each arm.
7
Engraved on some of the shards were alchemical symbols that the great Paracelsus had used and that midwives liked to use as well.