Crossword Clue:

Rock used to make sparks

AnswerCrossword Clue
FLINTRock used to make sparks
AGATERock used to make marbles
CBGBVenue Ramones used to rock
RIPRAPRock used to slow erosion
GANISTERRock used to line furnaces
YOYOSThey're used to rock the cradle
MAGMAWhat igneous rock used to be
MATTPOND"Love to Get Used" rock singer from Philadelphia
BRIDE"I knew the ... when she used to rock and roll"