From Wikipedia:
Punk (fireworks): A punk is a smoldering stick used for lighting firework fuses.
Rock (geology): In geology, rock (or stone) is any naturally occurring solid mass or aggregate of minerals or mineraloid matter.

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From Wikipedia:
Punk (fireworks): A punk is a smoldering stick used for lighting firework fuses.
Rock (geology): In geology, rock (or stone) is any naturally occurring solid mass or aggregate of minerals or mineraloid matter.