Answer:

LAVA

Answer	Crossword Clue
LAVA	Fuji flow
LAVA	Hot rock?
LAVA	Hot stuff

LAVA	Pumice, essentially
LAVA	Volcano output
LAVA	Fluid rock
LAVA	Hawaiian heat
LAVA	Volcanic flow
LAVA	Body shop soap
LAVA	Etna output
LAVA	Hot issuance?

LAVA	Volcanic flower
LAVA	Volcano's output
LAVA	Not-so-hard rock?
LAVA	Nash's priest
LAVA	Hot issue?
LAVA	Molten rock
LAVA	Obsidian, once
LAVA	Pinatubo flow

LAVA	Stromboli spillage
LAVA	Red-hot rock
LAVA	Material for a volcanologist
LAVA	Stromboli stuffing?
LAVA	Igneous rock, originally
LAVA	Rock that runs
LAVA	Rock made liquid
LAVA	Rock that's hot

LAVA	Kilauea flow
LAVA	Magma on the surface
LAVA	Spatter cone's output
LAVA	Hot rock
LAVA	Pumice source
LAVA	Destructive flow
LAVA	Red flower?
LAVA	Rock found in rivers

LAVA	Basalt, once
LAVA	It forms obsidian
LAVA	Hawaiian flower?
LAVA	Red-hot outpouring
LAVA	Etna flow