hat
Nan uityèm syèk la ak nevyèm, tretman relijye ki asosye yon wòch patikilye ak yon apòt te ekri, pou ke "yo ta dwe enskri non yo sou wòch yo Fondasyon, ak bon madanm li." Pratike te vin kenbe douz wòch ak mete youn nan yon mwa. Koutim nan pote yon birthstone sèl se sèlman yon syèk kèk fin vye granmoun, menm si otorite modèn diferan sou dat. Kunz mete koutim lan nan dizwityèm syèk Polòy, pandan y ap Enstiti a jewolojik nan Amerik kòmanse li nan Almay nan 1560 yo.
eng
In the eighth and ninth century, religious treatises associating a particular stone with an apostle were written, so that “their name would be inscribed on the Foundation Stones, and his virtue.” Practice became to keep twelve stones and wear one a month. The custom of wearing a single birthstone is only a few centuries old, though modern authorities differ on dates. Kunz places the custom in eighteenth century Poland, while the Gemological Institute of America starts it in Germany in the 1560s.