Answer: scoria

AnswerCrossword Clue
SCORIASlaggy lava.
scoriathe refuse, dross, or slag left after melting or smelting metal; scum
scoriathe dross or slag from metal smelting
SCORIACellular lava
SCORIASmelter slag
SCORIAOre slag
SCORIADross
SCORIASlag.
SCORIAMetal refuse.
SCORIALava.
SCORIAVolcanic cinder.
SCORIASlag
SCORIARefuse of a smeltery.
SCORIARefuse from melting of metals.
SCORIALeftover of the smelting process.
SCORIACinders from a volcano.
SCORIADross; slag.
SCORIADross.
SCORIASmelting residue
SCORIAMetal dross
SCORIAFoolhardy
SCORIASmelting refuse