What word or phrase does your mother always say?
early 13c., from Latin aureola (corona), fem. diminutive of aureus "golden" (see aureate). In medieval Christianity, the celestial crown worn by martyrs, virgins, etc., as victors over the flesh.
A band of metamorphic rock surrounding a body of cooled magma. Aureoles form through the process of contact metamorphism. See more at contact metamorphism.