Earrings

Boyd’s Bible Dictionary:

Concise Bible Dictionary:

The well-known ornament worn by women and men in the East (Gen. 24:22, 30, 4722And it came to pass, as the camels had done drinking, that the man took a golden earring of half a shekel weight, and two bracelets for her hands of ten shekels weight of gold; (Genesis 24:22)
30And it came to pass, when he saw the earring and bracelets upon his sister's hands, and when he heard the words of Rebekah his sister, saying, Thus spake the man unto me; that he came unto the man; and, behold, he stood by the camels at the well. (Genesis 24:30)
47And I asked her, and said, Whose daughter art thou? And she said, The daughter of Bethuel, Nahor's son, whom Milcah bare unto him: and I put the earring upon her face, and the bracelets upon her hands. (Genesis 24:47); Job 42:1111Then came there unto him all his brethren, and all his sisters, and all they that had been of his acquaintance before, and did eat bread with him in his house: and they bemoaned him, and comforted him over all the evil that the Lord had brought upon him: every man also gave him a piece of money, and every one an earring of gold. (Job 42:11); Hos. 2:1313And I will visit upon her the days of Baalim, wherein she burned incense to them, and she decked herself with her earrings and her jewels, and she went after her lovers, and forgat me, saith the Lord. (Hosea 2:13); etc.). In Isaiah 3:2020The bonnets, and the ornaments of the legs, and the headbands, and the tablets, and the earrings, (Isaiah 3:20) the allusion is not to a ring for the ear, but to an amulet on which a charm could be written.

From Manners and Customs of the Bible:

Genesis 35:44And they gave unto Jacob all the strange gods which were in their hand, and all their earrings which were in their ears; and Jacob hid them under the oak which was by Shechem. (Genesis 35:4). They gave unto Jacob all the strange gods which were in their hand, and all their ear-rings which were in their ears; and Jacob hid them under the oak which was by Shechem.
Ear-rings were of various sizes, shapes, and material. At the present day, among the Orientals, they are of gold, silver, brass, ivory, horn, and wood; they are sometimes plain, and sometimes adorned with precious stones. Some are small, and fit closely to the ear, leaving no intermediate space; while others are large and heavy, and drop some distance below the ear. Some of these, by their weight, make a disagreeable-looking hole in the part of the ear whence they hang. MacGregor saw some men near Lake Huleh with ear-rings “not in the lobe of the ear, but in the projecting flesh.” (Rob Roy on the Jordan, p. 150). It is supposed by some that the use of ear-rings among the Hebrews was confined to the women. If so there must have been exceptions. See Exodus 32:22And Aaron said unto them, Break off the golden earrings, which are in the ears of your wives, of your sons, and of your daughters, and bring them unto me. (Exodus 32:2).
It is evident from this text that it was customary to connect the use of ear-rings with idolatry. This is further intimated in Hosea 2:1313And I will visit upon her the days of Baalim, wherein she burned incense to them, and she decked herself with her earrings and her jewels, and she went after her lovers, and forgat me, saith the Lord. (Hosea 2:13), where the wearing of ear-rings is associated with burning incense to Baal. Isaiah 3:2020The bonnets, and the ornaments of the legs, and the headbands, and the tablets, and the earrings, (Isaiah 3:20) is also supposed to refer to idolatrous practices. Ear-rings were doubtless used as amulets. With strange figures and characters engraved upon them they were considered as charms warding off evil. They are still thus used in the East. Jacob, being commanded to go to Bethel to renew his covenant with God, desired to put away every vestige of idolatry from the people, and for this reason buried these ear-ring amulets with the teraphim tinder the oak.