Chrysoritis aureus, the Heidelberg copper or golden opal, is a species of butterfly in the family Lycaenidae.

It is endemic to South Africa, where it is found in montane grassland in Gauteng and Mpumalanga provinces.

Adults are on wing year-round with peaks in December and March.

[2] The larvae feed on Clutia pulchella varieties.

They are attended to by Crematogaster liengmei ants.