>>42625246
https://en.wikipedia.org/wiki/Unicursal_hexagram
It's a magic symbol, initially used by italian "alchemists" and people who are into "magic", then was popularized by self-proclaimed magician Alister Crowley. According to the Thelema, it's meant to "represent the interweaving of the planetary and elemental forces", which fits the theme of "elements of harmony.
It isn't related to jewish mysticism.