Larian made a pretty tacky mistake in its design of Act I-Citadel Level 7! The symbol on the floor is a six-pointed "Star of David." This is NOT an occult symbol and isn't really appropriate in this setting.
It's a Hexagram.
The pentagram, or five-pointed star, is more associated with the occult. However, (as any Wiccan could tell you), the way it's displayed has significance. A pentagram with a single point on top denotes "white magic" whereas an inverted pentagram denotes "black magic."
Actually the inverted pentagram is the symbol of satanism.