Source: The Great Interpretation of Dreams (Ibn Sirin)
(By analogy with salt and the color black) Black salt may indicate money with doubtful sources or worry related to money.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
(By analogy) It may indicate a man of bad character or strife caused by money.
Source: Signs in the Science of Expressions (Ibn Shaheen)
(By analogy) It is interpreted as worry and grief because of money.