Gold filled jewelry refers to a process in which a layer of karat gold is heat- and pressure- bonded to a layer of base metal. This process keeps the metal tarnish resistant because it completely covers the surface of the base metal. Gold filled jewelry can be 10kt, 14kt, 18kt, 22kt, and 24kt. It looks like solid gold since its outermost layer is actually gold, however, it is a harder, more durable, and less expensive option than solid gold. Compared to gold plating or vermeil, gold filled jewelry contains 100% more gold, it is generally safe for wearers with allergies to common metals, and it is tarnish resistant. Gold is generally a soft metal; therefore, it should be worn with care to avoid bending, dents, and scratches.