text: * 999.999—six nines fine: The purest gold ever produced. Refined by the Perth Mint in 1957.
  * 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.
  * 999.9—four nines fine: Most popular. E.g. ordinary Canadian Gold Maple Leaf and American Buffalo coins.
  * 999—24 karat, also occasionally known as three nines fine: e.g., Chinese Gold Panda coins.
  * 995: The minimum allowed in Good Delivery gold bars.
  * 990—two nines fine
  * 986—Ducat fineness: Formerly used by Venetian and Holy Roman Empire mints; still in use in Austria and Hungary.
  * 958.3—23 karat
  * 916—22 karat: Crown gold. Historically the most widely used fineness for gold bullion coins, such as the oldest American Eagle denominations from 1795–1833.  Currently used for British Sovereigns, South African Krugerrands, and the modern (1986—present) American Gold Eagles.
  * 900—one nine fine: American Eagle denominations for 1837–1933; currently used in Latin Monetary Union mintage (e.g. French and Swiss "Napoleon coin" 20 francs).
  * 899—American Eagles briefly for 1834—1836.
  * 834—20 karat
  * 750—18 karat: In Spain oro de primera ley  (first law gold).
  * 625—15 karat
  * 585—14 karat
  * 583.3—14 karat: In Spain oro de segunda ley (second law gold).
  * 500—12 karat
  * 417—10 karat: Lowest legal solid gold karat made in the US prior to the August 2018 revision of the FTC Guides (Now 1 karat is legal). 
  * 375—9 karat: Minimum standard for gold in some of the Commonwealth realms: Australia, Canada, New Zealand, UK, etc. It is also the minimum in Austria, Ireland, Portugal and France.
  * 333—8 karat: Minimum standard for gold in Germany after 1884. It is also the minimum for Denmark, Greece and Mexico.
  * 1 karat: Legal minimum for gold in the US since the revision of the FTC Guides of August 2018.