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2. Body piercing materials - Wikipedia

   en.wikipedia.org/wiki/Body_piercing_materials

   Bronze is an alloy of different metals but the most common blend (in piercing jewelry) is 90% copper and 10% tin. When buying bronze jewelry, buyers should make sure to buy from a reputable seller as some bronzes can contain arsenic which can "bleed" into your body.

3. Non-ferrous metal - Wikipedia

   en.wikipedia.org/wiki/Non-ferrous_metal

   In metallurgy, non-ferrous metals are metals or alloys that do not contain iron (allotropes of iron, ferrite, and so on) in appreciable amounts.. Generally more costly than ferrous metals, non-ferrous metals are used because of desirable properties such as low weight (e.g. aluminium), higher conductivity (e.g. copper), [1] non-magnetic properties or resistance to corrosion (e.g. zinc). [2]

4. List of jewellery types - Wikipedia

   en.wikipedia.org/wiki/List_of_jewellery_types

   Medical alert jewelry; Membership pin; Military dog tags; Pledge pins; Prayer jewelry Japa malas; Prayer beads; Prayer rope; Rosary beads; Puzzle jewelry. Puzzle ring; Signet ring; Thumb ring; Gemstone Jewelry

5. Diamagnetism - Wikipedia

   en.wikipedia.org/wiki/Diamagnetism

   Diamagnetic materials are those that some people generally think of as non-magnetic, and include water, wood, most organic compounds such as petroleum and some plastics, and many metals including copper, particularly the heavy ones with many core electrons, such as mercury, gold and bismuth.

6. Titanium gold - Wikipedia

   en.wikipedia.org/wiki/Titanium_gold

   In metallurgy, titanium gold (Ti-Au or Au-Ti) refers to an alloy consisting of titanium and gold.Such alloys are used in dentistry, [1] [2] ceramics and jewelry. [3] Like many other alloys, titanium gold alloys have a higher yield strength, tensile strength, hardness, and magnetism than either of its constituent metals.

7. Hematite - Wikipedia

   en.wikipedia.org/wiki/Hematite

   The magnetic structure of α-hematite was the subject of considerable discussion and debate during the 1950s, as it appeared to be ferromagnetic with a Curie temperature of approximately 1,000 K (730 °C), but with an extremely small magnetic moment (0.002 Bohr magnetons). Adding to the surprise was a transition with a decrease in temperature ...