set A) of 5 Norman petrological thin section mineral rock microscope slides

Five older Norman mineral slides labelled Orthoclase (1) , Orthoclase (2) (different locality), Pitchstone from Arran, Section Granite Mount Sorel ,Malacolite (indistinct). These are older slides and might be slightly different thickness to modern slides.

Seen above in plane polarised and cross polarised light x30

In good condition for age.