I've heard about "blue amber". There is such athing like blue amber?
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Yes, there is blue amber and it could be found in amber mines from Dominican Republic.
This coloration of amber cannot be seen under artificial light, but under sunlight.
When sunlight strikes the surface of blue amber, it has a blue fluorescent appearance.
It seems that it's property of having a blue fluorescence under ultraviolet light is due to the presence of anthracene, that resulted from an incomplete combustion.
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