The two main types of hookah coals are quick-lighting hookah coals and natural hookah coals. Quick-light coals and natural coals use wood, rice, or coconut charcoal briquettes.
Manufacturers coat quick-lighting hookah coals with a chemical accelerant, such as benzene or sulfur. The accelerant allows each piece to be lit quickly using nothing but an open flame. This means that smokers using quick-lighting coals don't need a coil burner to light their charcoal. Instead, they can light their coals with a candle lighter, torch, or cigarette lighter. The convenience offered by quick-light charcoal is unmatched. The primary drawback is that the chemical accelerant may interfere with the flavor of your shisha.
Natural hookah coals do NOT contain any chemical accelerant. You can't use an open flame to light them, so you must have an electric coil burner. You can invest in a charcoal burner if you have a gas stove. Natural hookah coals are less convenient than quick-light coals because they take longer to light. However, natural coals tend to burn longer and more evenly than quick-lighting coals. Since they aren't coated in a chemical accelerant, natural hookah coals often provide a cleaner tasting, more accurate flavor profile to your smoke session.