Reference: Fataawa Noor ‘alad-Darb – Question No.5757, Page 202, Volume 11
Question: Is it permissible for me to wear gold at parties and joyous occasions?
Response: Yes, it is permissible for her to wear gold at [joyous] occasions and parties, so long as non-mahram men do not see it; [what is intended is] that those around her are only women or men who are from her mahrams.