:salam2: Sister,
Every believing woman is obliged to cover her beauty and adornment before non-mahram men, because Allaah says (interpretation of the meaning):
“And tell the believing women to lower their gaze (from looking at forbidden things), and protect their private parts (from illegal sexual acts) and not to show off their adornment except only that which is apparent (like both eyes for necessity to see the way, or outer palms of hands or one eye or dress like veil, gloves, headcover, apron), and to draw their veils all over Juyoobihinna (i.e. their bodies, faces, necks and bosoms) and not to reveal their adornment except to their husbands, or their fathers, or their husband’s fathers, or their sons, or their husband’s sons, or their brothers or their brother’s sons, or their sister’s sons, or their (Muslim) women (i.e. their sisters in Islam), or the (female) slaves whom their right hands possess, or old male servants who lack vigour, or small children who have no sense of feminine sex. And let them not stamp their feet so as to reveal what they hide of their adornment. And all of you beg Allaah to forgive you all, O believers, that you may be successful”
[al-Noor 24:31]
Adornment includes kohl, makeup, jewellery, etc.
With regard to the words at the beginning of the verse – “And tell the believing women to lower their gaze (from looking at forbidden things), and protect their private parts (from illegal sexual acts) and not to show off their adornment except only that which is apparent” – what is meant by “that which is apparent” is the clothing, abayah (outer garment) and headcover, and whatever appears unintentionally, because of the wind, for example.
Ibn Katheer (may Allaah have mercy on him) said: i.e., she should not show anything of her adornment to non-mahrams, apart from that which cannot be hidden. Ibn Mas’ood said: Such as the rida ‘ (cloak) and clothes, i.e., what the Arab women used to wear of a miqna’ (a kind of outer garment) and what appears below from the garment. There is no sin in that, because this is something that cannot be hidden. That is like what appears of a woman’s lower garment, and what cannot be hidden.
End quote from Tafseer Ibn Katheer, 3/274
From Islam QA