Claim: Breaking a mirror brings one seven years of bad luck.
Origins: These days the accidental breaking of a small mirror (like the hand-held or self-standing kinds typically used when applying cosmetics or shaving) usually produces no more thought in most people than "I have to get a new mirror." The
breaking a large wall-mounted or floor mirror, however, may still often elicit the exclamation, "Uh-oh, that's seven years of bad luck."
But why should the act of breaking a mirror bring one seven years of bad luck? The individual elements have long featured in myth and superstition — the mirror serving as a representation of the soul and number seven being associated with portentous events — but answers about how and why they came to be linked in this particular fashion have been lost in the mists of time.
The generally accepted explanation for why breaking a mirror brings one bad luck is that the reflection in a mirror represents not just one's physical appearance
but also one's soul, so damaging a mirror also damages the soul of the one who broke it. More elaborate explanations posit that the damaged soul which results from mirror breakage is less capable of protecting a person from misfortune (and thus that person will be subject to more "bad luck" in the future) or that the damaged soul itself brings down the bad luck as an act of revenge against the mirror breaker's carelessness.
Many sources tie the amount of bad luck brought about by breaking a mirror (i.e., seven years' worth) to the Romans, who are said to have believed that life renewed itself every seven years. Damaging a mirror was tantamount to damaging one's health and therefore brought about a calamity that would not be fully righted until the next seven-year cycle had passed.
As with many superstitions, the "breaking a mirror brings bad luck" belief has prompted the creation of a variety of counter-superstitions — antidotes that, if applied quickly enough by the mirror breaker, will ward off the otherwise inevitable run of bad luck:
Throw salt over your shoulder. (This is also a remedy for other forms of bad luck-producing accidents, such as spilling salt.)
Immediately spin around three times in a counter-clockwise direction. (This act is often said to bring about bad luck in itself; doing so after breaking a mirror confuses the spirits and reverses the bad luck.)
Grind the mirror shards into a fine power. (This prevents any more reflections from being viewed in the damaged mirror.)
Gather the broken mirror pieces and submerge them in the waters of a south-running stream. (This will wash away the bad luck after only seven hours rather than seven years.)
Use flames to burn or blacken the mirror fragments, then bury them a year later. (Burying the fragments will lift the hex after only one year.)
Take a piece of the broken mirror and touch it to a tombstone. (This will immediately lift the curse of bad luck.)