Clue: Mineral with high carbon content

Answer: ANTHACITE

Length: 9

---

Similar Clues:

• Capable of withstanding high temperatures (OVENPROOF with 9 letters)
• High-tech card contents (MEMORY with 6 letters)
• Pottery whose high iron content gives it a distinctive hue (REDWARE with 7 letters)
• Highly efficient carbon sink (PEAT with 4 letters)
• Highly contentious situation (HORNETSNEST with 11 letters)
• Italian drink with high alcohol content (GRAPPA with 6 letters)
• It may feature a high salt content (SHAKER with 6 letters)
• Like full-bodied wines with high alcohol content (HEARTY with 6 letters)
• "Optimism is the content ___ men in high places": Fitzgerald (OFSMALL with 7 letters)
• It reduces mineral content (WATERSOFTENER with 13 letters)