Gold is one of the three precious metals used in jewelry. Gold is a bright and sunny yellow and is durable. Gold’s beautiful luster is what attracted people to it in the first place. It creates a rich background for the sparkle of beautiful gems. Gold is the rarest. It makes up only about four parts per billion of the earth’s crust. Gold is both malleable and ductile than platinum and silver. Gold’s appeal comes mostly from its color, luster, rarity, and resistance to corrosion.

Gold is more than 19 times as dense as water. Karat is a unit of measure for the fineness of gold, based on a total of 24 parts, abbreviated “K.” In the US, the most popular gold alloy used in jewelry is 14K. In other countries, 8K, 9K, 10K, 18K, and 22K to 24K gold are popular for jewelry.