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 USA 375—9 karat 333—8 karat: Minimum standard for gold in Germany after 1884 Silver 999.99—five nines fine: The purest silver ever produced. This was achieved by the Royal Silver Company of Bolivia. 999.9—four nines fine: ultra-fine silver used by the Royal Canadian Mint for their Silver Maple Leaf and other silver coins 999—fine silver or three nines fine: used in Good Delivery bullion bars and most current silver bullion coins. Used in U.S. silver commemorative coins and silver proof coins starting in 2019. 980: common standard used in Mexico ca. 1930–45 958: () Britannia silver 950: French 1st Standard 947.9: 91 zolotnik Russian silver 935: Swiss standard for watchcases after 1887, to meet the British Merchandise Marks Act and to be of equal grade to 925 Sterling. Sometimes claimed to have arisen as a Swiss misunderstanding of the standard required for British Sterling. Usually marked with three Swiss bears. 935: used in the Art Deco period in Austria and Germany. Scandinavian silver jewellers used 935 silver after the 2nd World War 925: () Sterling silver The UK has used this alloy from the early 12th century. Equivalent to "plata de primera ley" in Spain (first law silver) 917: a standard used for the minting of Indian silver (rupees), during the British raj and for some coins during the first Brazilian Republic. 916: 88 zolotnik Russian silver 900: one nine fine, coin-silver , or 90%