John Gill Commentary Isaiah 3:21

"the rings, and the nose-jewels;" — Isaiah 3:21 (ASV)

Regarding The rings on their finger, as Aben Ezra observes, and nose jewels, the same with the jewels on the forehead or nose (Ezekiel 16:12) - not that they hung upon the nose, but fastened upon the forehead and hung down to the nose ; an allusion to this is in Proverbs 11:22.

Though Austin says it was a custom of the women of Mauritania to put jewels in their nose, which is still kept in Persia, Arabia, and other countries, as travellers affirm.