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  2. Prices of chemical elements - Wikipedia

    en.wikipedia.org/wiki/Prices_of_chemical_elements

    This is a list of prices of chemical elements. Listed here are mainly average market prices for bulk trade of commodities. Data on elements' abundance in Earth's crust is added for comparison. As of 2020, the most expensive non-synthetic element by both mass and volume is rhodium.

  3. Peridot - Wikipedia

    en.wikipedia.org/wiki/Peridot

    Peridot (/ ˈ p ɛ r ɪ ˌ d ɒ t,-ˌ d oʊ / PERR-ih-dot, -⁠⁠doh), sometimes called chrysolite, is a yellow-green transparent variety of olivine. Peridot is one of the few gemstones that occur in only one color.

  4. History of United States postage rates - Wikipedia

    en.wikipedia.org/wiki/History_of_United_States...

    However, this legislation was set to expire in April 2016. As a result, the Post Office retained one cent of the price change as a previously allotted adjustment for inflation, but the price of a first-class stamp became 47 cents: for the first time in 97 years (and for the fourth time in the agency's history) the price of a stamp decreased. [32]

  5. Gold as an investment - Wikipedia

    en.wikipedia.org/wiki/Gold_as_an_investment

    For example, if one owns a share in a gold mine where the costs of production are US$300 per troy ounce ($9.6 per gram) and the price of gold is $600 per troy ounce ($19/g), the mine's profit margin will be $300. A 10% increase in the gold price to $660 per troy ounce ($21/g) will push that margin up to $360, which represents a 20% increase in ...

  6. Troy weight - Wikipedia

    en.wikipedia.org/wiki/Troy_weight

    C-19 [17] Thus one troy ounce = 480 grains × 0.064 798 91 grams/grain = 31.103 476 80 grams. Since the ounce avoirdupois is defined as 437.5 grains, a troy ounce is exactly 480 ⁄ 437.5 = 192 ⁄ 175 or about 1.09714 ounces avoirdupois or about 9.7% more. The troy ounce for trading precious metals is considered to be sufficiently approximated ...

  7. Silver as an investment - Wikipedia

    en.wikipedia.org/wiki/Silver_as_an_investment

    In 1792, the gold/silver price ratio was fixed by law in the United States at 15:1, [11] which meant that one troy ounce of gold was worth 15 troy ounces of silver; a ratio of 15.5:1 was enacted in France in 1803. [12] The average gold/silver price ratio during the 20th century, however, was 47:1. [13]

  8. Federal Reserve holds interest rates steady, forecasts two ...

    www.aol.com/finance/fed-expected-skip-june-rate...

    Officials paused in June but signaled a willingness to raise rates again to tame inflation.

  9. Peridotite - Wikipedia

    en.wikipedia.org/wiki/Peridotite

    Peridotite is named for the gemstone peridot, a glassy green gem originally mined on St. John's Island in the Red Sea [65] and now mined on the San Carlos Apache Indian Reservation in Arizona. [ 66 ] Peridotite that has been hydrated at low temperatures is the protolith for serpentinite , which may include chrysotile asbestos (a form of ...

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