How can gold mica be distinguished by gold?
Gold jewelry is golden, has a metallic luster, soft, good ductility. The gold mica is made of copper, much lighter than the gold jewelry of the same volume.
It is not actually a metal, but an aluminum silicate containing iron, magnesium, and potassium. It is often used as a preservative and heat insulating material, and the jewelry is made of copper and yellow.
