Gold is the most popular choice of metal for jewelry comes in different colors. Gemvara offers yellow, white, and rose gold; but can be made into other colors depending on the alloys it is mixed with. Pure gold is a bright, shiny yellow color, and is very dense and malleable; therefore requiring it to be mixed with other alloys to become suitable for use. Gold has been a valuable precious metal used for coinage, jewelry, and a variety of other things since before recorded history and throughout human history has been the most common basis for monetary policies. As of 2009, 165,000 tons of gold has been mined, equivalent to a cube 20.4 meters on each side.
Pure gold is 24k but gold jewelry is typically 22k, 18k, 14k, or 10k. Yellow gold in jewelry is alloyed with a 50/50 ratio of silver and copper to maintain the bright yellow. White gold alloys are typically made with palladium, silver, zinc, or nickel. Although nickel has been phased out of creating white gold as some people have a skin reaction with the metal. Rose gold is formed by mixing mostly pure gold with a small amount of copper to enhance the reddish tones. Blue gold contains iron, while purple gold has aluminum; both are rarely used since they are particularly brittle and difficult to work with in jewelry. When pure gold mixes with only silver, the result is a greenish-yellow shade and is referred to as green gold.