SC347 - Aragonite

Locality: La Serna Quarry (La Tinaja Quarry), La Serna, Pantoja, Toledo, Castile-La Mancha, Spain (MINDAT)
Size: 12 mm - Thumbnail (<1 inch)
Weight: 0.5 g
minID: EQU-246

Acicular aragonite cluster, honey colored. The sphere is 12mm in diameter. Fluorescent yellowish white under UV light, with white phosphorescence/afterglow.

Fluorescence under longwave UV light (365nm LED).

Fluorescence spectra after excitation with 275nm UVC LED, 305nm UVB LED and 365nm UVA LED. The fluorescence (peaks around 400nm) is probably due to humic acid, while the second peak at about 500nm is due to greenish phosphorescence/afterglow.

Last update: 08 June 2021