Scintillating
verb
give off
“the substance scintillated sparks and flashes”
Similar: scintillate
verb
reflect brightly
“Unquarried marble sparkled on the hillside”
Similar: sparkle, scintillate, coruscate
verb
emit or reflect light in a flickering manner
“Does a constellation twinkle more brightly than a single star?”
Similar: twinkle, winkle, scintillate