Boyd’s Bible Dictionary:
Rings worn in the nose
Still affected in the East (Isa. 3:21).
Concise Bible Dictionary:
These were rings, ornamented with jewels, and generally passed through the right side of the nostril, hanging down by the mouth. This mode of decoration is referred to in Proverbs 11:22: “As a jewel of gold in a swine’s snout, so is a fair woman which is without discretion.” In Isaiah 3:21 The nose jewels are mentioned among other adornments of women, which should be taken away in God’s judgments; and in Ezekiel 16:12, among the ornaments spoken of symbolically with which God adorned Jerusalem, is “a jewel on thy forehead,” which should however read “a ring upon thy nose.”