epyollotli.

Headword: 
epyollotli.
Principal English Translation: 

pearl(s)

Louise M. Burkhart, Before Guadalupe: The Virgin Mary in Early Colonial Nahuatl Literature, Institute for Mesoamerican Studies Monograph 13 (Albany: University at Albany, 2001), 56.

Alonso de Molina: 

epyollotli. perla preciosa, o aljofar.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 29r. col. 1. Thanks to Joe Campbell for providing the transcription.

Attestations from sources in English: 

ornamentos pontificales. yevatl ynic centlamantli. amito, niman ye yn alba camisatli, yhuan maquiltitiuh in cassula morada, yhuan cenca tlaçotli yn icpactzinco actiuh Mitra, coztic teocuitlaycpatica yectlamacho. yhuan tlaçoteyo epyolloyo. = the pontifical ornaments, which were first the amice, then the alb, a shirt; then he had on the purple chasuble, and on his head a very precious miter, finely embroidered with golden thread and covered with precious stones and pearls, (central Mexico, 1612)
Annals of His Time: Don Domingo de San Antón Muñón Chimalpahin Quauhtlehuanitzin, James Lockhart, Susan Schroeder, and Doris Namala, eds. and transl. (Stanford: Stanford University Press, 2006), 206–207.

teopeyollotzintle chalchiuhtzintle S.ta mac = oh sacred pearl, oh jade, oh Saint Mary! (early seventeenth century, Central Mexico)
Louise M. Burkhart, Before Guadalupe: The Virgin Mary in Early Colonial Nahuatl Literature, Institute for Mesoamerican Studies Monograph 13 (Albany: University at Albany, 2001), 56.