Flint rock is any hard-edged rock such as quartz, jasper, agate or carnelian. You can use the rocks to create a spark, and with practice, a fire–without matches. This is…
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Flint rock is any hard-edged rock such as quartz, jasper, agate or carnelian. You can use the rocks to create a spark, and with practice, a fire–without matches. This is…