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2. Fineness - Wikipedia

   en.wikipedia.org/wiki/Fineness

   For example, knowing that standard 18-karat yellow gold consists of 75% gold, 12.5% silver and the remaining 12.5% of copper (all by mass), the volume of pure gold in this alloy will be 60% since gold is much denser than the other metals used: 19.32 g/cm 3 for gold, 10.49 g/cm 3 for silver and 8.96 g/cm 3 for copper.

3. Gold dollar - Wikipedia

   en.wikipedia.org/wiki/Gold_dollar

   The gold dollar or gold one-dollar piece is a gold coin that was struck as a regular issue by the United States Bureau of the Mint from 1849 to 1889. The coin had three types over its lifetime, all designed by Mint Chief Engraver James B. Longacre. The Type 1 issue has the smallest diameter (0.5 inch =12.7mm) of any United States coin minted to ...

4. Vienna Philharmonic (coin) - Wikipedia

   en.wikipedia.org/wiki/Vienna_Philharmonic_(coin)

   For the 25th anniversary of the Vienna Philharmonic gold coin, the mint introduced the 1 ⁄ 25-ounce coin featuring the same design, but with a face value of 4 euros. Also for the anniversary, 5,000 proof sets of the one-ounce and one-quarter ounce coins were produced. [9] The 1 ⁄ 25-ounce coin has been continued in production.

5. Nines (notation) - Wikipedia

   en.wikipedia.org/wiki/Nines_(notation)

   1 troy ounce of four nines fine gold (999.9) Nines are an informal logarithmic notation for proportions very near to one or, equivalently, percentages very near 100%. Put simply, "nines" are the number of consecutive nines in a percentage such as 99% (two nines) [1] or a decimal fraction such as 0.999 (three nines).

6. Prices of chemical elements - Wikipedia

   en.wikipedia.org/wiki/Prices_of_chemical_elements

   While the difficulty of obtaining macroscopic samples of synthetic elements in part explains their high value, there has been interest in converting base metals to gold (Chrysopoeia) since ancient times, but only deeper understanding of nuclear physics has allowed the actual production of a tiny amount of gold from other elements for research ...

7. 0.9 (disambiguation) - Wikipedia

   en.wikipedia.org/wiki/0.9_(disambiguation)

   0. 9 or 0.999..., a repeating decimal; HTTP/0.9, the first documented official version of HTTP This page was last edited on 2 December 2024, at 21:44 (UTC). Text is ...