Monday-ish word: argyria

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argyria (är-jĭr′ē-ə), noun

Discoloration of the skin caused by exposure to silver.

Wikipedia lists some examples of people with argyria from taking silver supplements; even if the supplements are stopped, the blue-gray discoloration is permanent.

The picture below is from the cover of a book Rosemary Jacobs, who developed argyria after being prescribed nasal drops containing silver.

Etymology: Greek argyros, silver