The secret is in the materials that burn.
Combining the rare-earth metal ytterbium with copper created a shower of long sparks that turned from gold to green.
The American Chemical Society (ACS) released a video on Wednesday showing the sparkler experiments in action.
The team published itsresults in the American Chemical Society journal ACS Omegain August.
The researchers also experimented with creating eye-catching fountains.
The striking sparklers won’t be found at fireworks stands anytime soon.
