Is it Haram to beautify oneself in front of other Muslim women?

All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.

A Muslim woman can expose her beauty in front of Muslim women as Allah Says (what means): {… and not expose their adornment except to their husbands, their fathers, their husbands' fathers, their sons, their husbands' sons, their brothers, their brothers' sons, their sisters' sons, their women…} [Quran 24:31]

Allah also Says (what means): {There is no blame upon women concerning their fathers or their sons or their brothers or their brothers' sons or their sisters' sons or their women or those their right hands possess. And fear Allah. Indeed Allah is ever, over all things, Witness.} [Quran 33:55]

Know that it is permitted only if there is no temptation in doing so; also, she should not expose her ‘Awrah.

The ‘Awrah of a Muslim woman (parts of the body that should not be exposed) in front of other Muslim women is from the navel to the knees.

For more benefit on the ‘Awrah (body parts that should be concealed as per the sharee'ah) of a woman in front of another Muslim woman and in front of a non-Muslim woman, please refer to Fatawa 92295 and 82459.

Allah knows best.