Relevance
Relevance
| Parameter | Peat | Lignite (Brown Coal) | Bituminous (Soft Coal) | Anthracite (Hard Coal) |
| Coal Status | Not considered true coal | Low-grade coal | Medium-grade coal | Highest-grade coal |
| Stage in Coal Formation | Initial stage | Early coal stage | Advanced coal stage | Final coal stage |
| Carbon Content | Very low | Low | High | Very high |
| Moisture Content | Very high | High | Moderate | Very low |
| Heat (Calorific) Value | Very low | Low | High | Very high |
| Sulphur Content | Negligible | Low | Generally high | Very low |
| Formation Condition | Partial decomposition of plant matter | Increased heat and pressure | Further increase in heat and pressure | Maximum heat and pressure |
| Typical Occurrence | Swamps and bogs | Shallow burial zones | Deeply buried sedimentary basins | Highly metamorphosed coal beds |
| Uses | Not used as fuel | Limited power generation | Major industrial and power fuel | Premium fuel, metallurgy |
| Availability | Abundant locally | Limited in many regions | Widely available | Scarce in most regions |