Treatment with Sodium elevates plasma Calcium level. Therefore, a significant increase in plasma Calcium level may be a step to confirming stones induction. This supported with histological evidence clears every doubt.
or normal light microscope with polarizing "filter, lens.."
What can you see with a polarizing microscope?
Polarized Light Microscopy. Polarization contrast is a contrast method to detect birefringence, which is a material characteristic that can be found in minerals, polymers, crystals, pharmaceutical samples, biomedical samples and even botanical samples.