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  2. Emirates Gold - Wikipedia

    en.wikipedia.org/wiki/Emirates_Gold

    Emirates Gold is a precious metal refinery, bullion manufacturer, and dealer based in Dubai, United Arab Emirates.Working primarily with gold and silver, the company produces its own bullion (such as 995 and 999.9 purity kilobars) which is recognized internationally, as well as other products such as investment bars in sizes ranging from 1 gram to 100 grams, and customized coins and medals.

  3. Gold coin - Wikipedia

    en.wikipedia.org/wiki/Gold_coin

    Gold coins for sale at the Dubai Gold Souk. A gold coin is a coin that is made mostly or entirely of gold.Most gold coins minted since 1800 are 90–92% gold (22‑karat), while most of today's gold bullion coins are pure gold, such as the Britannia, Canadian Maple Leaf, and American Buffalo.

  4. Vienna Philharmonic (coin) - Wikipedia

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

    The gold Philharmonic has a fineness of 999.9 (often written 0.9999, also known as 24 karat or 99.99% pure). [4] In most countries in Europe, the gold Philharmonic is traded VAT-free while the Silver Philharmonic is partly subject to a reduced VAT rate. The coins are minted according to demand and production varies from year to year accordingly.

  5. Fineness - Wikipedia

    en.wikipedia.org/wiki/Fineness

    For example, knowing that standard 18-carat 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.

  6. Troy weight - Wikipedia

    en.wikipedia.org/wiki/Troy_weight

    The only troy weight in widespread use is the British Imperial troy ounce and its American counterpart. Both are based on a grain of 0.06479891 gram (exact, by definition), with 480 grains to a troy ounce (compared with 437 + 1 ⁄ 2 grains for an ounce avoirdupois). The British Empire abolished the 12-ounce troy pound in the 19th century.

  7. 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).

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