
The surface characteristics of natural yellow pearl sample (a), dyed pearl samples (b, c) and the cross-section (d-f)
Figures of the Article
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Photos (a, b, g, h) and fluorescence characteristics(d, e, f, i, j) of yellow to golden Akoya pearl samples and dyed yellow pearl samples (c)
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The surface characteristics of natural yellow pearl sample (a), dyed pearl samples (b, c) and the cross-section (d-f)
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Uneven fluorescence distribution on the surface of the pearl samples under De Beers SYNT detect
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Uneven fluorescence distribution of the cross sections of dyed pearl samples 20×
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The UV-Vis spectra of the yellow Akoya pearl samples: (a) uniform colour cross sections; (b) uneven colour cross sections
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The PL spectra of natural yellow pearl samples and dyed pearl samples: (a) uniform colour cross sections; (b) uneven colour cross sections
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The PL spectra of cross sections of natural yellow pearl samples and dyed pearl samples
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