Silver comes with many type names: fine silver, Britannia, sterling, etc.  This is what they all refer to.

 

.999 Fine Silver 99.9% Pure Silver 0.01% trace metals
.9584 Britannia 95.84% Pure Silver 4.16% Copper
.925 Sterling 92.5% Pure Silver 7.5% Copper
.830 European 83% Pure Silver 17% Copper
.800 European 80% Pure Silver 20% Copper

 

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