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2. Superhard material - Wikipedia

   en.wikipedia.org/wiki/Superhard_material

   A material is also considered hard if it resists plastic deformation. If a material has short covalent bonds, atomic dislocations that lead to plastic deformation are less likely to occur than in materials with longer, delocalized bonds. If a material contains many delocalized bonds it is likely to be soft. [10]

3. Titanium ring - Wikipedia

   en.wikipedia.org/wiki/Titanium_ring

   Titanium rings are jewelry rings or bands which have been primarily constructed from titanium. The actual compositions of titanium can vary, such as "commercial pure" (99.2% titanium) or "aircraft grade" (primarily, 90% titanium, 6% aluminum, 4% vanadium), and titanium rings are often crafted in combination with other materials, such as gemstones and traditional jewelry metals.

4. Graphene - Wikipedia

   en.wikipedia.org/wiki/Graphene

   Graphene is known for its exceptionally high tensile strength, electrical conductivity, transparency, and being the thinnest two-dimensional material in the world. [4] Despite the nearly transparent nature of a single graphene sheet, graphite (formed from stacked layers of graphene) appears black because it absorbs all visible light wavelengths.

5. Tungsten - Wikipedia

   en.wikipedia.org/wiki/Tungsten

   Polycrystalline tungsten is an intrinsically brittle [18] [19] [20] and hard material (under standard conditions, when uncombined), making it difficult to work into metal. However, pure single-crystalline tungsten is more ductile and can be cut with a hard-steel hacksaw .

6. The world’s strongest material could be used to make clean ...

   www.aol.com/news/world-strongest-material-could...

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7. Wedding ring - Wikipedia

   en.wikipedia.org/wiki/Wedding_ring

   A wedding ring is commonly worn on the ring finger. A pair of wedding rings. A wedding ring or wedding band is a finger ring that indicates that its wearer is married. [1] It is usually forged from metal, traditionally gold or another precious metal. Rings were used in ancient Rome during marriage. [2]