milagro
/mɪˈlaɡrəʊ/US
noun
In Mexico and among Hispanic Americans: a small object, frequently an ornament or piece of jewellery, representing the subject of a petitionary prayer, usually fastened to the image of the Virgin or of a saint to strengthen the petition or to give thanks that the petition has been granted.
Origin
Late 19th century; earliest use found in Scribner's Magazine. From Spanish milagro.