Mangano-Calcite Fluorescence

Figure 1: transmission fluorescence image of a section of mangano-calcite and forsterite from Sweden. The mangano-calcite is fluorescent.

Figure 2: same section in plane polarized light. The dark mineral is hausmanite.

Figure 3: same mangano-calcite sample fluorescence in reflection.

Figure 4: transmission plane polarized view.

Figure 5: crossed polars view. The bright interference colors come from forsterite.

Figure 6: another sample from the same place. Transmission fluorescence.

Figure 7: same sample viewed in reflection fluorescence. The fluorescence seems to originate from the rims of the crystals.

Figure 8: same section in transmission plane polarized view.

A higher amount of opaque hausmanite  and less forsterite can be seen compared to the first sample.

Figure 9: fluorescence spectra of the two samples recorded with the Alpy 600.