Volborthite FoV 4,5mm Volborthite FoV 4,5mm Volborthite FoV 0,7mm
Volborthite FoV 0,7mm
Leucite, Nephelline, Apatite FoV 4,5mm Allophane, Volborthite FoV 4mm Allophane, Volborthite FoV 4mm
Allophane, Volborthite FoV 4mm Allophane, Volborthite FoV 2mm