A rare piece of solid zektzerite (after sogdianite, according to the label) with a little microcline and some mica group mineral. Under shortwave UV light the zektzerite fluoresces bright white, while the albite a dull red. A hypothesis is that while the zektzerite is the bright white fluorescent mineral, the unaltered sogdianite is the dimmer, grey one. The mica also may have a little dark yellow / brown fluorescence. The label is also quite interesting: from the Fersman Mineralogical Museum, Moscow.
Fluorescence under shortwave UV light.
Normal light.
Fluorescence under shortwave UV light.
Normal light.
Label from the Fersman Mineralogical Museum, Moscow.
