Amulets

were ornaments, gems, scrolls. etc.. worn as preservatives against the power of enchantments, and generally inscribed with mystic forms or characters. The "earrings" in (Genesis 35:4) were obviously connected with idolatrous worship and were probably amulets taken from the bodies of the slain Shechemites, and you can find more about that here on st-takla.org on other commentaries and dictionary entries. They are subsequently mentioned among the spoils of Midian. (Judges 8:24) In (Hosea 2:13) is another like reference. The "earrings" in (Isaiah 3:20) were also amulets.