Question
Asked 1 October 2024

Why is cuprorivaite fluorescence in the green color only?

Blue and green samples from an archaeological mural painting were analyzed using a Raman spectrometer.
The results showed:
1- Blue color: It appeared that it is Egyptian blue )(cuprorivaite )
2- Green color: It is mixture of yellow and blue color, where appeared the distinctive bands of the Orpiment, but the blue color it with a background fluorescence (it is believed to be Egyptian blue (cuprorivaite ) according to the results of the SEM-EDX)..

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