Brimstone Sulfur “Leviathan Cross”)
Here is the meaning of this symbol:
Brimstone Sulfur (“Leviathan Cross”) – A symbol for the alchemical element Sulfur
which is spiritually analogous to the human soul. Alchemically, sulfur has the qualities of masculine, hot and dry. Combined with Mercury (feminine, cool and moist), the pair were considered the parents of all metals. Alchemical drawings often portray Sulfur as the sun.
The symbol of sulfur is often used as an identifying symbol by Satanists, due to sulphur’s historical asociation with the devil.
It really has nothing to do with Satan, just people wanting a cool symbol and since it is not your typical cross and many don’t know what the symbol actually stands for, they use it.
Another symbol that I love is the Fire Element symbol (because it’s my element as a Sagittarius) and being a pyramid triangle shape it’s mystical.
Fire (Elemental Fire, “Blade”)
The upward pointing triangle is the alchemical symbol for fire. One of the four classical elements, fire has the properties of heat and dryness, and symbolizes the “fiery” emotions- love, hate, passion, compassion, empathy, anger, etc., as well as spiritual aspiration- those actions of intent which bring us closer to the divine. Fire is represented in numerous cultures as the triangle, symbolizing a rising force. The symbolism of the upward-pointing triangle symbolizes rising energy. The element is sometimes represented by a sword or knife; when paired with the chalice of water, it is referred to as the blade. In Paracelsian alchemical tradition, the elemental spirits of fire are salamanders. The fire symbol is derived from the medieval magical Seal of Solomon. Zodiac signs ruled by the element of fire are: Aries, Leo, and Sagittarius.