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How gold is produced
Where does gold come from? - David Lunney
GOLD | How It's Made
How GOLD is made
Where Does Gold Come From? | The Origin Of Gold | Gold Mining & Refining Process | Dr Binocs Show
How is gold made?
How did gold appear on Earth?
SPACE LAB: Where Did All the Gold in the Universe Come From?
Gold | How It's Made
Where Does Gold Come From? | Colour: The Spectrum of Science | Earth Science
how is gold formed
All About GOLD: Mining, History and Science
