Application of powdered samples polarized light microscopy in identification of artists pigments;
By polarized light microscopy can be seen the etiology for most pneumoconioses (even those in coal miners)--silica crystals.
②The Congo red staining is the classic and most specific histochemical test, the fibrils demonstrate characteristic apple-green birefringence when examined under polarized light microscopy, which provide basis on confirming the diagnosis.
