From Symbols.com

chaos

The sun sign, sun, with the sign for the planet Earth, earth, placed over it. This combination is an ideogram for chaos and confusion. It appears in a chemistry textbook written in the year 1728. Semiotically we see matter, earth, dominating the spirit, sun, by being placed above it, meaning that materialistic considerations are allowed to take precedence, resulting in chaos.
    Turned the other way, perfection, it means perfection, quinta essentia. See also quinta essentia.