For those of us who are looking for ways to test the purity of gold, there is good news! Scientists have developed a new, non-destructive method of testing the purity of gold that does not require any of the destructive methods currently in use. This method uses an ultraviolet laser to measure the presence of certain elements in gold, allowing for a precise measurement of its purity. This new method will not only make it easier to determine the purity of gold, but it will also make it possible to do so without causing any damage to the gold itself.

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source: Phys.org