Coin Pinger

Acoustic bullion authentication — free, private, on-device

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Coin guides

Coin ping test guides

Official specifications and acoustic resonance references for gold and silver bullion coins — browse by silver, gold, most popular, fractional size, or junk silver, compute any other coin from its specs, or test any 1 oz .999 silver round by diameter in the app.

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High Good Provisional* — how confident we are in each computed reference (based on how well-established the metal's constants are).

Silver

Armenian Noah's Ark 1 oz Barber Dime (1892–1916) Barber Half Dollar (1892–1915) Barber Quarter (1892–1916) British Half Crown (pre-1920) Canadian Silver Dollar (1935–1967) Franklin Half Dollar French 5 Francs (1848–1878) Germania 1 oz Italy 500 Lire Kennedy Half Dollar (1964) Mercury Dime (1916–1945) Morgan Dollar Peace Dollar Roosevelt Dime (1946–1964) Silver African Wildlife 1 oz Silver American Eagle 1 oz Silver APMEX Round 1 oz Silver Bounty 1 oz Silver Britannia 1 oz Silver Britannia 1 oz (1997–2012) Silver Chinese Lunar 1 oz Silver Chinese Lunar 30 g (2016+) Silver Kangaroo 1 oz Silver Koala 1 oz Silver Kookaburra 1 oz Silver Krugerrand 1 oz Silver Libertad 1 oz Silver Libertad 2 oz Silver Lunar Series II 1 oz Silver Lunar Series III 1 oz Silver Lunar Series III 2 oz Silver Maple Leaf 1 oz Silver Panda 1 oz (1989–2015) Silver Panda 30 g Silver Philharmonic 1 oz Standing Liberty Quarter (1916–1930) Swiss 5 Francs (1931–1969) UK Royal Arms 1 oz Walking Liberty Half Dollar Washington Quarter (1932–1964)

Silver — fractional sizes

Silver Britannia 1/2 oz Silver Britannia 1/4 oz Silver Libertad 1/2 oz

Gold

Austrian 1 Ducat Austrian 100 Corona Austrian 8 Florins / 20 Francs British Half Sovereign French 20 Francs German 20 Mark Gold American Eagle 1 oz Gold Azadi Gold Britannia 1 oz Gold Britannia 1 oz (1987–2012) Gold Britannia 1 oz (2013–2025) Gold Buffalo 1 oz Gold Double Eagle $20 Gold Kangaroo 1 oz Gold Krugerrand 1 oz Gold Libertad 1 oz Gold Lunar Series III 1 oz Gold Maple Leaf 1 oz Gold Panda 1 oz (pre-2016) Gold Panda 15 g Gold Panda 3 g Gold Panda 30 g Gold Panda 8 g Gold Philharmonic 1 oz Gold Sovereign Mexican 10 Pesos Mexican 2.5 Pesos Mexican 20 Pesos Mexican 5 Pesos Mexican 50 Pesos Centenario Swiss 20 Francs Vreneli

Gold — fractional sizes

Gold American Eagle 1/10 oz Gold American Eagle 1/2 oz Gold American Eagle 1/4 oz Gold APMEX Round 1/4 oz Gold Britannia 1/10 oz Gold Britannia 1/2 oz Gold Britannia 1/4 oz Gold Kangaroo 1/10 oz Gold Kangaroo 1/2 oz Gold Kangaroo 1/4 oz Gold Krugerrand 1/10 oz Gold Krugerrand 1/2 oz Gold Krugerrand 1/4 oz Gold Libertad 1/10 oz Gold Libertad 1/2 oz Gold Libertad 1/4 oz Gold Maple Leaf 1/10 oz Gold Maple Leaf 1/2 oz Gold Maple Leaf 1/4 oz Gold Philharmonic 1/10 oz Gold Philharmonic 1/2 oz Gold Philharmonic 1/4 oz

* Certain your coin is genuine but it doesn't match? Record 10 pings and we'll debug it with you — we're actively building the product and improving these references.

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