Can I Bring Rainbow Flame Crystals on a Plane to United States?

According to TSA guidelines, many flame crystals contain HAZMAT.  Passengers may bring flame crystals but only in checked baggage luggage.  Even if an item is generally permitted, it may be subject to additional screening or not allowed through checked baggage if it triggers an alarm during the screening process, appears to have been tampered with, or poses other security concerns. The final decision rests with the TSA officer on whether to allow any item on the plane. Passengers should check the product label for indications of flammable contents or other hazards.