ðə kɹˈɪstəl stɹˈʌktʃɚɹ ʌvðə mˌɛɾəmˈoːɹfɪk ɹˈɑːk hɐz tʃˈeɪndʒd ˌoʊvɚ tˈaɪm,  ænd ɪɾ ɪz nˈaʊ pɹˈɑːpɚli ɹᵻfˈɜːd tʊ æz mˈɑːɹbəl.
The crystal structure of the metamorphic rock has changed over time,  and it is now properly referred to as marble.