Observatoire des droits humains (anglais seulement)

How can you test if gold is pure? Some methods are more destructive than others

(Version anglaise seulement)

par Michael Cortie, Physics Discipline Leader, University of Technology Sydney

When it comes to gold, how pure is pure? And how does anybody know?

As recent revelations about the Perth Mint have shown, gold buyers and sellers take purity very seriously. Questions have been raised over impurities found in some A$9 billion worth of gold sold to the Shanghai Gold Exchange.

While the gold reportedly met the industry standard for 99.99% (or “4N”) purity, it failed to meet extra agreed specifications for the level of silver.

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