People often think that breaking a mirror may bring you bad luck for 7 years. Mirror superstitions probably evolved from the time when the first humans saw their reflections in a pool of water, believed that the image in a water was their actual soul and to endanger it would mean risking injury to the other self. An ancient myth was that mirrors have magical powers, including the power to foreseen the future and are thought to be devices of the Gods. Thus breaking a mirror would terminate its powers, the soul would be astray form the body and misfortunes would be brought upon the one whose reflection it last held.
In old times, mirrors were not cheap and they were low quality and easily defected. In order to avoid negligence it was told that breaking a mirror bring seven years of bad luck.
A variety of remedies are available to break the spell of misfortune. The Romans are also responsible for little known measure for avoiding the curse useful for anyone who breaks a mirror.
The luckless who accidentally break a mirror, and does not wish seven years of ill-lack, must take all the pieces of the mirror and bury them in the moonlight, or take all pieces and throw them into running water, or pound the broken mirror into tiny pieces so that none of them can reflect anything ever again.