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  2. Fineness - Wikipedia

    en.wikipedia.org/wiki/Fineness

    1 troy ounce of four nines fine gold (999.9) 999.999—six nines fine: The purest gold ever produced. Refined by the Perth Mint in 1957. [3] [4] 999.99—five nines fine: The purest type of gold currently produced; the Royal Canadian Mint regularly produces commemorative coins in this fineness, including the world's largest, at 100 kg. [5]

  3. 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).

  4. Wohlwill process - Wikipedia

    en.wikipedia.org/wiki/Wohlwill_process

    The resulting gold is 99.999% pure, and of higher purity than gold produced by the other common refining method, the Miller process, which produces gold of 99.5% purity. [1] [2] [3] For industrial gold production the Wohlwill process is necessary for highest purity gold applications.

  5. Gold parting - Wikipedia

    en.wikipedia.org/wiki/Gold_parting

    Invented by Emil Wohlwill in 1874, the Wohlwill process produces the highest purity gold (99.999%). It is an electrolytic process using pure gold for the cathode (or ...

  6. 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.

  7. Costco is now selling platinum bars. Here's the price of a bar.

    www.aol.com/costco-now-selling-platinum-bars...

    Described as 999.5 pure platinum, the new bar is Swiss-made by a refiner that has earned the Good Delivery accreditation from the London Bullion Market Association (LBMA), an international trade ...

  8. List of bullion coins - Wikipedia

    en.wikipedia.org/wiki/List_of_bullion_coins

    Bullion coins are government-minted, legal tender coins made of precious metals, such as gold, palladium, platinum, rhodium, and silver.They are kept as a store of value or an investment rather than used in day-to-day commerce.

  9. 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.

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