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  2. Hardnesses of the elements (data page) - Wikipedia

    en.wikipedia.org/wiki/Hardnesses_of_the_elements...

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more

  3. Superhard material - Wikipedia

    en.wikipedia.org/wiki/Superhard_material

    Most metal borides are hard; [41] however, a few stand out among them for their particularly high hardnesses (for example, WB 4, [42] [43] RuB 2, OsB 2 and ReB 2). These metal borides are still metals and not semiconductors or insulators (as indicated by their high electronic density of states at the Fermi Level ); however, the additional ...

  4. List of fictional elements, materials, isotopes and subatomic ...

    en.wikipedia.org/wiki/List_of_fictional_elements...

    A silvery substance, one of the hardest in the Pokémon world, and which only occurs on Silver Rock Isle. The locals sell wing-shaped pin talismans fashioned from silver rock stone. Silverstone Elemental Assassin: Magic metal that can absorb and negate elemental magic, at the cost of generating heat (melting the metal if it absorbs too much).

  5. Metals of antiquity - Wikipedia

    en.wikipedia.org/wiki/Metals_of_antiquity

    The metals of antiquity are the seven metals which humans had identified and found use for in prehistoric times in Africa, Europe and throughout Asia: [1] gold, silver, copper, tin, lead, iron, and mercury. Zinc, arsenic, and antimony were also known during antiquity, but they were not recognised as distinct metals until later.

  6. Osmium - Wikipedia

    en.wikipedia.org/wiki/Osmium

    Manufacturers use its alloys with platinum, iridium, and other platinum-group metals to make fountain pen nib tipping, electrical contacts, and in other applications that require extreme durability and hardness. [12] Osmium is among the rarest elements in the Earth's crust, making up only 50 parts per trillion . [13] [14]

  7. Bronze - Wikipedia

    en.wikipedia.org/wiki/Bronze

    The archaeological period during which bronze was the hardest metal in widespread use is known as the Bronze Age. The beginning of the Bronze Age in western Eurasia and India is conventionally dated to the mid-4th millennium BCE (~3500 BCE), and to the early 2nd millennium BCE in China; [1] elsewhere it gradually spread across regions.

  8. I Tried the 'Harvard Riddle'—the 'Hardest Riddle in the World ...

    www.aol.com/tried-harvard-riddle-hardest-riddle...

    However, my friends love all things riddles and puzzles, so I tried the Harvard riddle out on my crew. I wish I could show you the looks on their faces as I recited the Harvard riddle aloud to them.

  9. Adamantium - Wikipedia

    en.wikipedia.org/wiki/Adamantium

    It was a small slug of adamantium, the toughest and hardest of all metals..." Adamant and the literary form adamantine occur in works such as The Faerie Queene, Paradise Lost, Gulliver's Travels, The Adventures of Tom Sawyer, The Lord of the Rings, [4] and the film Forbidden Planet (as "adamantine steel").