Calcite
Baelo-Claudia San Bartolomé quarry, Tarifa, Cádiz, Andalusia, Spain
Highly luminescent karstic calcite
Halogen light – Long wave UV 400 nm
Long wave UV 365 nm – Short wave UV 255 nm (backside)
Supposedly activators are salts of fulvic and/or humic acids derivated from organic matter
Green phosphorescence in attached pic
© Josele