The sound comes from Clash of Clans, the popular mobile strategy game by Supercell, where gems act as the premium currency used to speed up building, buy resources, and unlock special items. Players hear this chime whenever gems are gathered or awarded, so it quickly became linked with progress and good fortune inside the game. Outside the game, Clash of Clans clips and gameplay videos helped the chime spread online, and creators now reuse it as a shorthand for any small victory, windfall, or satisfying payoff.