PPL (plane polarized), XPL (cross polarized), CL (CathodoLuminescence)
Afrikanda [under construction]
Sokli [under construction]
Turiy Mys [under construction]
Vuoriyarvi [under construction]
TECHNICAL DATA: Cathodoluminescence (CL): "cold cathode", MK 8200, from CTL Cambridge, on microscope Olympus BX40. Photograph: digital camera Nikon Coolpix 995 on Olympus BX40 ('normal' field width 4 mm, unless otherwise stated ('zoom' field width 1 mm); original picture size 200 by 1500, reduced to 1600 by 1200 for web reasons.