Amulet

Amulet, noun, borrowed from French amulette, from Middle French amulete, from Latin amulētum. “a charm against spells, disease”, perhaps related to amoliri "to avert, to carry away, remove."

• A charm or a piece of jewelry thought to protect against evil, danger, disease or negative forces
• A lucky charm or talisman

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     An amulet, also known as a good luck charm, is an object believed to confer protection upon its possessor. Anything can function as an amulet. Items commonly used as amulets include gems, statues, coins, drawings, plant parts, animal parts, and written words.
    Amulets which are said to derive their extraordinary properties and powers from magic or those which impart luck are typically part of folk religion or paganism. Amulets or sacred objects of mainstream religion are believed to have no power of their own without being blessed by a clergyman, and they supposedly will also not provide any benefit to the bearer who is not trying to be “righteous.”. 
     Talismans and amulets are synonymous in meaning and refer to any object having the power to avert evil influences or bad luck. An amulet is an object that is generally worn for protection and made from a durable material (metal or hard-stone). The word 'talisman' is typically used to describe symbols or writing on paper. 
     Amulets are sometimes confused with pendants, small objects that hang from necklaces. Any given pendant may also be an amulet