Gold-Filled vs. Gold Plated Jewelry — GLDN
BTW, to be legally called "solid gold," the alloy must be at least 10 out of 24 parts gold, or "10k gold." 14k Gold-Filled. Layers of solid 14k gold are pressure bonded to a core of jeweler's brass. The resulting thick layer of gold means it's durable and top quality and just a step down from solid gold.