What does HAB stand for on a 10K earring?

HAB on a 10K earring typically stands for the manufacturer's hallmark or the initials of the designer or jeweler who created the piece. The "10K" indicates that the earring is made of gold that contains 10 parts gold and 14 parts other metals, making it 41.7% pure gold. Hallmarks like HAB help authenticate the quality and origin of the jewelry. Always check with a reputable jeweler for confirmation of specific markings.