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2. Ionized jewelry - Wikipedia

   en.wikipedia.org/wiki/Ionized_jewelry

   An Ionized bracelet, or ionic bracelet, is a type of metal bracelet jewelry purported to affect the chi of the wearer. No claims of effectiveness made by manufacturers have ever been substantiated by independent sources, and the US Federal Trade Commission (FTC) has found the bracelets are "part of a scheme devised to defraud".

3. Magnet therapy - Wikipedia

   en.wikipedia.org/wiki/Magnet_therapy

   Magnetic therapy is a pseudoscientific alternative medicine practice involving the weak static magnetic field produced by a permanent magnet which is placed on the body. It is similar to the alternative medicine practice of electromagnetic therapy , which uses a magnetic field generated by an electrically powered device. [ 1 ]

4. Copper - Wikipedia

   en.wikipedia.org/wiki/Copper

   Copper is commonly used in jewelry, and according to some folklore, copper bracelets relieve arthritis symptoms. [192] In one trial for osteoarthritis and one trial for rheumatoid arthritis, no differences were found between copper bracelet and control (non-copper) bracelet. [193] [194] No evidence shows that copper can be absorbed through the ...

5. Cupronickel - Wikipedia

   en.wikipedia.org/wiki/Cupronickel

   Cupronickel or copper–nickel (CuNi) is an alloy of copper with nickel, usually along with small quantities of other metals added for strength, such as iron and manganese. The copper content typically varies from 60 to 90 percent. (Monel is a nickel–copper alloy that contains a minimum of 52 percent nickel.)

6. Body piercing materials - Wikipedia

   en.wikipedia.org/wiki/Body_piercing_materials

   As said, gold jewelry should only be used in healing piercings if it is nickel free or palladium based. Allergy to gold is uncommon but it does exist, and then mostly from white gold. [9] [10] In some extreme cases, the copper in the jewelry can tarnish and cause greenish discoloring of the tissue. Gold can become discolored from autoclaving ...

7. Beryllium copper - Wikipedia

   en.wikipedia.org/wiki/Beryllium_copper

   Beryllium copper (BeCu), also known as copper beryllium (CuBe), beryllium bronze, and spring copper, is a copper alloy with 0.5–3% beryllium. [1] Copper beryllium alloys are often used because of their high strength and good conductivity of both heat and electricity. [2] It is used for its ductility, weldability in metalworking, and machining ...