Answered by Ustadh Salman Younas
Question: Is there any prohibition for women to wear ornaments while performing umrah?
Answer: assalamu `alaykum
It is permissible for a woman to wear ornaments/jewelry while in the state of ihram. `A’isha (Allah be well pleased with her) was specifically asked about this and deemed it permitted, as per a narration in Bukhari.
It is best to wear only ornamentation that is deemed the customarily minimum. It would be disliked to wear it to a degree that would draw undue attention to oneself from the opposite gender.
[Ibn `Abidin, Radd al-Muhtar; Ibn Qudama, al-Mughni]
Allah Knows Best