symbolizes protection, balance (sometimes between individuals, but sometimes between the masculine and feminine side of one person), and sometimes a symbol of free choice and equality

it is one symbol for sulfur in alchemy (although a more common symbol is a fire triangle on a cross of earth)

because of it's use as a symbol for sulfur, it has been associated with the fire and brimstone idea of hell

created by The Knights Templar according to some

used by Anton LaVey in The Satanic Bible

similar to the cross of Lorraine