Chromium = Fluorescence 

Tony is back with a short video on how different stones present in different lighting.
We would like to start by saying, all of these gemstones are 100% genuine.
If you have read Tony's blogs in the past you will have an understanding of the different elements that create each gemstones colour.
Chromium in these pieces creates a fluorescence when the gemstone is put under UV lighting. The gemstones which feature Iron as their colour-causing element do not fluoresce under UV light.
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