Related Clues:

• Cigar byproduct
• Camel by-product
• Flicker's bit
• Camel droppings?
• Chimney residue
• Post-magma?
• Bone china component
• Lenten symbol of penitence
• Fire leftovers
• Bat wood, typically
• Molten flow
• Waste material
• Smelter residue
• Eruption particle
• Volcanic material