someHerrings:
Swedish Sphalerite in Calcite - WL
someHerrings:
Swedish Sphalerite in Calcite - UVb
someHerrings:
Swedish Sphalerite in Calcite - UVc
someHerrings:
Swedish Sphalerite in Calcite - PHOS
someHerrings:
Swedish Sphalerite in Calcite - PHOS (photostimulated phosphorescence darkening)