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  2. Hierarchy of precious substances - Wikipedia

    en.wikipedia.org/wiki/Hierarchy_of_precious...

    Ancient Greek mythic-cultural cosmology depicted a decline from a golden age to a silver age followed by an Iron Age. In some variants there is a Bronze Age, an interim between the Iron Age and Silver Age. In Japan, the traditional Sho Chiku Bai (松竹梅) ranking system has a hierarchy of pine 松 (matsu), bamboo 竹 (take), and plum 梅 (ume ...

  3. Heavy metals - Wikipedia

    en.wikipedia.org/wiki/Heavy_metal_(elements)

    Being denser than the lithophiles, hence sinking lower into the crust at the time of its solidification, the chalcophiles tend to be less abundant than the lithophiles. [103] In contrast, gold is a siderophile, or iron-loving element. It does not readily form compounds with either oxygen or sulfur. [104]

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

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

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  5. Iron - Wikipedia

    en.wikipedia.org/wiki/Iron

    However, iron artefacts of great age are much rarer than objects made of gold or silver due to the ease with which iron corrodes. [86] The technology developed slowly, and even after the discovery of smelting it took many centuries for iron to replace bronze as the metal of choice for tools and weapons.

  6. Troy weight - Wikipedia

    en.wikipedia.org/wiki/Troy_weight

    Troy weights were first used in England in the 15th century and were made official for gold and silver in 1527. [1] The British Imperial system of weights and measures (also known as Imperial units ) was established in 1824, prior to which the troy weight system was a subset of pre-Imperial English units .

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  8. Talent (measurement) - Wikipedia

    en.wikipedia.org/wiki/Talent_(measurement)

    In Homer's poems, it is always used of gold and is thought to have been quite a small weight of about 8.5 grams (0.30 oz), approximately the same as the later gold stater coin or Persian daric. In later times in Greece, it represented a much larger weight, approximately 3,000 times as much: an Attic talent was approximately 26.0 kilograms (57 ...

  9. Golden plates - Wikipedia

    en.wikipedia.org/wiki/Golden_plates

    Based on the plates' lighter weight and Stowell's description of its corner's "greenish cast", one scholar has hypothesized Smith made the plates from copper, which weighs less than gold and rusts green. [185] LDS writers have speculated the plates could also exhibit those qualities if it were made of a copper-gold alloy like Mesoamerican tumbaga.