The Amyloid Stain Pack (Congo Red) is intended for use in the histological visualization of amyloid in tissue sections. Examination under a polarizing microscope results in green birefringence of amyloid. Light Microscopy: Amyloid:Red to Pink Erythrocytes:Light Orange Eosinophil Granules:Orange to Red Nuclei:Blue Polarized Light Microscopy: Amyloid:Green Birefringence