Source: The Great Interpretation of Dreams (Ibn Sirin)
An earring in a dream for a woman is adornment and marriage. If it is of pearl, it is knowledge and the Quran. For a man, it indicates trade or hearing singing.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
An earring indicates a male child. Whoever sees an earring in his ear will be blessed with a son or learn knowledge.
Source: Signs in the Science of Expressions (Ibn Shaheen)
An earring is interpreted as goodness and adornment. Whoever sees himself wearing one will attain goodness and adornment.