Seeing coal in your dream generally indicates immediate gains or business success. If you benefit from coal in your dream, it suggests the possibility of easy profits or receiving jewelry as a gift. This could mark the beginning of financial improvement in your life, resulting from your hard work.
From Imam Muhammad Ibn Seerin's Dictionary of Dreams According to Islamic Inner Traditions â entry "Coal" (page 89).
Burning coal in a dream means immediate earnings or a ready to fill order for one's merchandise. If one can benefit from it in his dream, it means easy benefits or receiving jewelry as a gift, or having a type of work in which one needs to use coal. Seeing burning coal in a dream also means seeking knowledge and wisdom. Coal in a dream also represents an evil and a dangerous person, or it could mean tainted money, unlawful earnings or receiving a grant from someone in the government. Burning coal in a dream also denotes someone who is unjustly suffering from hardships and trials or someone who's property is unjustly confiscated. Consumed or burned up coal in a dream means the same thing as ashes and signifies falsehood. Having large cuts of coal when one needs small pieces in a dream means worries, distress and concerns, while having fine crushed coal when one needs chunks to light a fire in a dream means diminishing of one's wealth. Seeing coal or charcoal in a dream also could mean increase or rejuvenation of one's sexual desires. Seeing coal in the winter in a dream means money. Fuel for the fire in a dream means corruption. (Also see Ashes)
Note: Islamic dream interpretation depends on the dreamer's circumstances and state. This is a general guide drawn directly from the source book.
