A counter or token.
{{quote-book|en|year=1978|author=Lawrence Durrell|title=Livia|publisher=Faber & Faber|year_published=1992|series=Avignon Quintet|page=490
game piece, game token
(eo-form of)
a game chip or token, a counter
a coin
a ''Scrabble'' tile
token
chip, token, jeton