Mineral: Fluorite
Locality: Berbes mining area, Berbes, Ribadesella, Comarca Oriente, Principality of Asturias (Asturias), Spain
Dimensions: 7 x 4.5 x 2.5 cm

Description: Activator of red fluorescence in fluorite seems to be Sm replacing Ca. As the more common blue fluorescence due to Eu use to be stronger, it easily quenches the red one. Under LW UV (Convoy 3W Nichia 365 nm LED)

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