• Knock these rocks together for an electrical effect. Flash rocks are one of the few minerals with piezoelectric properties. So, when subjected to mechanical stress, these two little rocks generate an electrical charge and glow. Part of Copernicus Toys Compact Curiosities line.
• Choking hazard. 
• These items are FINAL SALE and not eligible for return or exchange
• Ships from J&J HQ in Georgetown, Texas
  

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