You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is On Congo red staining amyloid is seen as and explain in detail?
Ref Robbins 9/e 257 Congo red under ordinary light impas a pink or red colour to amyloid deposits.under polarized light, the Congo red stained amyloid shows a green birefringence