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The Conversation
The Conversation
Michael Cortie, Professor emeritus, University of Technology Sydney

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

Gold Archimedes Perth Mint
Stasis Photo/Shutterstock

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.

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