Yes the stone age the Neolithic stone age, then the bronze age and then iron ageThey happened at different time in different places. People did not stop using flint just because bronze became available or stopped using bronze when iron became available. Bronze is a very useful metal and we still use it today. Flint when struck makes a spark and was used in that capacity long after it stopped being used for tools for lighting fires and to ignite gunpower in guns. In the 20th century it was used to ignite the fuel in cigraette lighters.

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