Answer: flints

AnswerCrossword Clue
FLINTS

Spark-producing stones

FLINTS

Stones for starting fires

FLINTS

Fire-striking stones

FLINTS
Prehistoric tools
FLINTS
Fire stones.
FLINTSParts of cigarette lighters.
FLINTSHard pieces of quartz.
FLINTSPrimitive implements.
FLINTSLighter essentials.
FLINTSPieces of hard stone.
FLINTSLighter needs
FLINTSLighters need these
FLINTSSpark makers
FLINTSFire-starting stones
FLINTSSpark producers