Fluorescence Chlorite Apatite section.
Raman spectra of this section can be found here.
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The fluorescence appears at the frontier between dark and clear regions in this section.
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Other view of this section, reflection illumination with the 405nm laser. The yellow fluorescence appears at the rim of dark areas. Some blue fluorescence is also visible.
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Composite view: white light transmission + 405nm laser illumination.
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White light illumination of the same section. The blue fluorescent regions appear very dark with this illumination.
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Same section between crossed polarizers. The blue fluorescent areas are dark thus not birefringent.
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Yellow-orange fluorescence spectrum.
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